JP6296640B2 - Raw kon residue treatment method - Google Patents
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Description
本発明は、例えば、生コン車による建設現場などへの生コン搬入後、生コン車のドラム内に残った生コンの残余物（残渣）を処理するなど生コン残渣の処理方法に関するものである。
The present invention relates to a method for treating raw concrete residues, for example, treating residual raw residue (residues) remaining in a drum of a raw concrete car after the raw concrete is brought into a construction site or the like by a raw concrete car.
一般に、生コン車は、バッチャープラントや生コン工場と呼ばれる製造工場で作られた生コンクリート（フレッシュ・コンクリート、生コン）を建築や土木の工事現場へ輸送するために使われる。 In general, ready-mixed concrete vehicles are used for transporting ready-mixed concrete (fresh concrete, ready-mixed concrete) made in a manufacturing factory called batcher plant or ready-mixed factory to a construction site or civil engineering construction site.
生コンクリートは輸送中でも適度な撹拌を行わないと骨材や水が分離し、均一でなくなってしまう。よって、容器（ドラム）をゆっくりと回転させて撹拌しながら輸送する必要がある。走行中に荷台上で可動する機構を搭載し、駆動軸をエンジン回転軸から分岐させるなどの特別な構造を持つため、特種用途自動車のいわゆる８ナンバー車となる。あらかじめ工場で生産されたコンクリート（レディーミクストコンクリート）を撹拌しながら輸送するものをアジテータというが、生コン車はアジテータに比べ、ドラムを高速で回転させることができる。しかしながら、構造的にはどちらも大差なく、最近ではコンクリートの輸送が容易になったことや、現場内に製造設備を設置したりするようになったことから車両内でコンクリートを製造する需要が少なくなってきていることで、アジテータが普及しており、生コン車もアジテータとして使用できるものが主流となってきている。 The ready-mixed concrete will not be uniform because aggregates and water will be separated if proper agitation is not performed during transportation. Therefore, it is necessary to transport the container (drum) while slowly rotating and stirring. Since it has a special structure such as mounting a mechanism that can move on the loading platform during travel and branching the drive shaft from the engine rotation shaft, it is a so-called 8-numbered special purpose vehicle. The agitator is a concrete agitator that transports concrete (ready-mixed concrete) produced in advance at the factory while stirring. The ready-mix car can rotate the drum at a higher speed than the agitator. However, there is not much difference in structure, and recently there has been little demand for producing concrete in vehicles due to the ease of transport of concrete and the installation of production equipment in the field. As a result, agitators have become widespread, and ready-to-use cars can be used as agitators.
ここで、生コン車は、通常のトラックが備える要素に加えて以下のような装置や部品が必要とされる。 Here, the ready-mix car requires the following devices and parts in addition to the elements of a normal truck.
まず、前述の様に、ドラムを必要とする。ドラムとは、生コンクリートを積載するための略円筒状をなす容器であり、走行中も常に回転し続けて骨材や水との分離を防ぎ、生コンクリートを均質に保つ機能を果たす。 First, as described above, a drum is required. The drum is a substantially cylindrical container for loading ready-mixed concrete, and continues to rotate during traveling to prevent separation from aggregates and water, and to keep the ready-mixed concrete homogeneous.
内部には螺旋形のプレートが付いており、生コンクリートを積む時は車両後方から見て反時計（左）方向に回し、下ろす時は逆回転する。ドラム混合容量は0.9m3(2トン車)から4.25m3(10トン車)程である。
次に、生コン車は、ホッパを有している。ホッパとは、車両後部上方にある、生コンクリートの投入口を指標する。最近では品質確保のため運搬時はカバーをかけることが多い。
次に、フローガイドを有している。フローガイドとは、後方の略V型をなす生コンの通り道のことである。生コンをシュートに集める、いわゆる「じょうご」の役目を果たしている。
次に、シュートを有する。シュートとは、生コンクリートを目的の荷降し位置へ導くための樋を指標するものであり、左右に回転する他に上下動作もできる構成となっている。
Inside is a spiral plate that turns counterclockwise (left) as seen from the rear of the vehicle when loading ready-mixed concrete, and reversely rotates when lowered. The drum mixing capacity is about 0.9m 3 (2 tons) to 4.25m 3 (10 tons).
Next, the ready-mixed vehicle has a hopper. The hopper refers to a fresh concrete inlet at the upper rear of the vehicle. Recently, in order to ensure quality, covers are often applied during transportation.
Next, it has a flow guide. A flow guide is a path of a live-con that has a substantially V shape at the back. It plays the role of a so-called “funnel” that collects raw kon to chute.
Next, have a chute. The chute is an index for a rod for guiding the ready-mixed concrete to a desired unloading position, and is configured to be able to move up and down in addition to rotating left and right.
例えば、コンクリートポンプ車のホッパ内など比較的高い場所へ降ろす時はシュートを上げる必要があるからである。
ここで、前述した生コン車による建設現場などへの生コン搬入後、生コン車のドラム内には生コンの残余物（残渣）があり、この生コンの残渣とドラム内を洗浄した洗浄水の処理をどの様にするかが課題とされている。
For example, it is necessary to raise the chute when lowering to a relatively high place such as in the hopper of a concrete pump car.
Here, after the raw concrete is brought into the construction site or the like by the raw concrete car described above, there is a residue (residue) of the raw concrete in the drum of the raw concrete car. The issue is how to do this.
従来は、図に示すように、生コン車のドラム内を洗浄すると共に、前記ドラム内から生コンの残渣を取り出し、それを網目状のパイプロスクリーン上に載置して、砂利と砂とを回収していた。 Conventionally, as shown in the figure, the inside of the drum of the ready-mixed vehicle is cleaned, and the residue of the ready-mixed concrete is taken out from the drum and placed on a mesh-like pipe screen to collect gravel and sand. Was.
しかしながら、前記回収した砂利と砂には残渣のコンクリートが付着しており、そのため、土壌基準値以上の重金属も付着し、これら砂利や砂も産業廃棄物として処理せざるを得ないものであった。 However, the collected gravel and sand have residual concrete adhering to them, so heavy metals exceeding the soil standard value also adhered, and these gravel and sand had to be treated as industrial waste. .
また、砂利や砂から分離した水についても，重金属が混入しているため下水として処理することできないものであった。
Also, water separated from gravel and sand could not be treated as sewage because it contained heavy metals.
本発明は、前記従来の課題に対処すべく創案されたものであって、生コン車のドラム内を洗浄すると共に、前記ドラム内から生コンの残渣を取り出し、それを網目状のパイプロスクリーン上に載置して、砂利と砂とを回収する際、前記回収した砂利と砂には残渣のコンクリートが付着せず、そのため、土壌基準値以上の重金属も付着せず、もって、これら砂利や砂も産業廃棄物として処理せずに再利用でき、しかも、砂利や砂から分離した水についても，重金属が混入していないため下水として処理することができる生コン残渣の処理方法を提供することを目的とするものである。
The present invention was devised to address the above-described conventional problems, and cleans the inside of a drum of a ready-mixed car, takes out the residue of the ready-mixed food from the inside of the drum, and places it on a mesh-like pipeline screen. When collecting and collecting gravel and sand, residual concrete does not adhere to the collected gravel and sand, so that heavy metals exceeding the soil standard value do not adhere, so these gravel and sand The purpose of the present invention is to provide a method for treating raw concrete residue that can be reused without being treated as industrial waste, and can be treated as sewage because water separated from gravel and sand does not contain heavy metals. To do.
本発明による生コン残渣の処理方法は、
生コンドラムから生コンを送出して所定の構築箇所へ搬入後、生コン残渣が残る生コンドラム内に、生コン残渣の固形物が１０％乃至２０％、水が８０％乃至８５％程度の割合となるよう水を注入し、水の注入後には、前記生コン残渣を水と固形物とに分離させる分離剤を投入し、分離剤投入後は、前記生コン残渣が固まらないよう前記生コンドラムを回転させ、前記生コン残渣を水と砂利及び砂を含む生コン残渣固形物とに予め前記生コンドラム内で分離させ、次いで、さらに前記生コンドラムを回転させて、前記砂利及び砂を含む生コン残渣固形物を砂利及び砂と重金属が封入された生コン残渣物とに分離し、
前記投入する分離剤は、ペーパースラッジが２８乃至６８重量部、無水石膏が１０乃至５０重量部、硫酸バンドが３乃至４３重量部、消石灰が８乃至４８重量部、ソーダ灰が０．４乃至２８重量部、ポルトランドセメントが０．３乃至２６重量部、高分子ポリマーが０．１乃至１１重量部、チオ硫酸ソーダが０．１５乃至２３重量部、硫酸第１鉄が０．１乃至２２重量部、シリカが０．０５乃至２１重量部、を含んで配合構成されてなり、
前記分離後、砂利及び砂と重金属が封入された生コン残渣物とがドラム内から取り出され、網目状に構成されたバイブロスクリーン上に送出され、前記バイブロスクリーンは水平方向に揺動され、バイブロスクリーンの網目を抜けた生コン残渣物や水は原水槽に貯留され、バイブロスクリーン上には網目を通過しない砂利が残り、該砂利はベルトコンベアを介して所定の回収箇所に回収され、重金属が混入した生コン残渣物が付着しない砂利となり、
原水槽に貯留された水とバイブロスクリーンの網目を抜けた生コン残渣物はポンプにより吸い上げられ、クラッシュファイヤーに投入され、クラッシュファイヤー内では、さらに水と重金属を含む生コン残渣物と砂とに分離され、前記砂は洗浄を経てリサイクルが可能な砂として回収され、水と重金属を含んだ生コン残渣物はスラッジ水槽に移送され、該スラッジ水槽内では撹拌された後、ろ布で形成されたフィルター内に移送され、該フィルター内でプレス処理され、重金属が含まれた生コン残渣物からなる脱水ケーキと重金属を含まない水とに分離され、該水は上澄水槽に送られた後、再利用される、
ことを特徴とし、
または、
生コン車の生コンドラムから生コンを送出して所定の構築箇所へ搬入後、生コン残渣が残る生コンドラム内に、生コン残渣の固形物が１０％乃至２０％、水が８０％乃至８５％程度の割合となるよう水を注入し、水の注入後には、前記生コン残渣を水と固形物とに分離させる分離剤を投入し、分離剤投入後は、前記生コン残渣が固まらないよう前記生コンドラムを回転させ、前記生コン残渣を水と砂利及び砂を含む生コン残渣固形物とに予め前記生コンドラム内で分離させ、次いで、さらに前記生コンドラムを回転させて、前記砂利及び砂を含む生コン残渣固形物を砂利及び砂と重金属が封入された生コン残渣物とに分離し、
前記投入する分離剤は、ペーパースラッジが２８乃至６８重量部、無水石膏が１０乃至５０重量部、硫酸バンドが３乃至４３重量部、消石灰が８乃至４８重量部、ソーダ灰が０．４乃至２８重量部、ポルトランドセメントが０．３乃至２６重量部、高分子ポリマーが０．１乃至１１重量部、チオ硫酸ソーダが０．１５乃至２３重量部、硫酸第１鉄が０．１乃至２２重量部、シリカが０．０５乃至２１重量部、を含んで配合構成されてなり、
前記分離後、砂利及び砂と重金属が封入された生コン残渣物とがドラム内から取り出され、網目状に構成されたバイブロスクリーン上に送出され、前記バイブロスクリーンは水平方向に揺動され、バイブロスクリーンの網目を抜けた生コン残渣物や水は原水槽に貯留され、バイブロスクリーン上には網目を通過しない砂利が残り、該砂利はベルトコンベアを介して所定の回収箇所に回収され、重金属が混入した生コン残渣物が付着しない砂利となり、
原水槽に貯留された水とバイブロスクリーンの網目を抜けた生コン残渣物はポンプにより吸い上げられ、クラッシュファイヤーに投入され、クラッシュファイヤー内では、さらに水と重金属を含む生コン残渣物と砂とに分離され、前記砂は洗浄を経てリサイクルが可能な砂として回収され、水と重金属を含んだ生コン残渣物はスラッジ水槽に移送され、該スラッジ水槽内では撹拌された後、ろ布で形成されたフィルター内に移送され、該フィルター内でプレス処理され、重金属が含まれた生コン残渣物からなる脱水ケーキと重金属を含まない水とに分離され、該水は上澄水槽に送られた後、再利用される、
ことを特徴とし、
または、
前記生コンドラム内の生コン残渣に洗浄水を投入して分離処理物を形成し、前記分離剤は前記分離処理物の容量の１％乃至３％の分量を投入した、
ことを特徴とするものである。
The method for treating raw kon residue according to the present invention includes:
After the raw concrete is sent from the raw concrete drum and carried to a predetermined construction location, the solid content of the raw concrete residue is 10% to 20% and the water is about 80% to 85% in the raw concrete drum where the raw concrete residue remains. Water is injected, and after the water injection, a separating agent that separates the biocon residue into water and solids is added, and after the separating agent is added, the biocon drum is rotated so that the biocon residue does not solidify, The ready- mixed residue is separated into water and ready- mixed residue solids containing gravel and sand in advance in the ready-mixed drum , and then the ready-mixed drum is further rotated to convert the ready-mixed residue solids containing gravel and sand into gravel and sand. And raw concrete residue encapsulated in heavy metal ,
The separating agent to be added is 28 to 68 parts by weight of paper sludge, 10 to 50 parts by weight of anhydrous gypsum, 3 to 43 parts by weight of sulfuric acid band, 8 to 48 parts by weight of slaked lime, and 0.4 to 28 of soda ash. Parts by weight, 0.3 to 26 parts by weight of Portland cement, 0.1 to 11 parts by weight of polymer, 0.15 to 23 parts by weight of sodium thiosulfate, and 0.1 to 22 parts by weight of ferrous sulfate In addition, the silica is mixed and composed of 0.05 to 21 parts by weight ,
After the separation, gravel and sand and raw concrete residue encapsulating heavy metal are taken out from the drum and sent out on a vibro screen having a mesh structure, and the vibro screen is swung horizontally, The raw concrete residue and water that have passed through the mesh are stored in the raw water tank, and gravel that does not pass through the mesh remains on the vibro screen, and the gravel is collected at a predetermined collection location via a belt conveyor and mixed with heavy metal. It becomes gravel where raw concrete residue does not adhere,
Water stored in the raw water tank and raw concrete residue that has passed through the mesh of the vibro screen are sucked up by a pump and put into a crash fire, and further separated into raw concrete residue containing water and heavy metals and sand in the crash fire. The sand is recovered as sand that can be recycled after washing, and the raw waste residue containing water and heavy metals is transferred to a sludge water tank and stirred in the sludge water tank, and then the filter is formed in a filter cloth. And is pressed in the filter, separated into dehydrated cake made of raw kon residue containing heavy metal and water not containing heavy metal, and the water is sent to the supernatant water tank and reused. The
It is characterized by
Or
The ratio of 10% to 20% of the solid content of the raw kon residue and 80% to 85% of the water of the raw kon residue in the raw kon drum where the raw kon residue remains after the raw kon is sent from the raw kon drum of the raw kon car After the water injection, a separating agent that separates the biocon residue into water and solids is introduced, and after the separation agent is introduced, the biocon drum is rotated so that the biocon residue does not solidify. The raw kon residue is separated into water and gravel and sand-containing raw kon residue solids in advance in the raw kon drum , and then the raw kon drum is further rotated to remove the gravel and sand-containing kon residue solids. Separated into gravel and sand and raw concrete residue encapsulated with heavy metals ,
The separating agent to be added is 28 to 68 parts by weight of paper sludge, 10 to 50 parts by weight of anhydrous gypsum, 3 to 43 parts by weight of sulfuric acid band, 8 to 48 parts by weight of slaked lime, and 0.4 to 28 of soda ash. Parts by weight, 0.3 to 26 parts by weight of Portland cement, 0.1 to 11 parts by weight of polymer, 0.15 to 23 parts by weight of sodium thiosulfate, and 0.1 to 22 parts by weight of ferrous sulfate In addition, the silica is mixed and composed of 0.05 to 21 parts by weight ,
After the separation, gravel and sand and raw concrete residue encapsulating heavy metal are taken out from the drum and sent out on a vibro screen having a mesh structure, and the vibro screen is swung horizontally, The raw concrete residue and water that have passed through the mesh are stored in the raw water tank, and gravel that does not pass through the mesh remains on the vibro screen, and the gravel is collected at a predetermined collection location via a belt conveyor and mixed with heavy metal. It becomes gravel where raw concrete residue does not adhere,
Water stored in the raw water tank and raw concrete residue that has passed through the mesh of the vibro screen are sucked up by a pump and put into a crash fire, and further separated into raw concrete residue containing water and heavy metals and sand in the crash fire. The sand is recovered as sand that can be recycled after washing, and the raw waste residue containing water and heavy metals is transferred to a sludge water tank and stirred in the sludge water tank, and then the filter is formed in a filter cloth. And is pressed in the filter, separated into dehydrated cake made of raw kon residue containing heavy metal and water not containing heavy metal, and the water is sent to the supernatant water tank and reused. The
It is characterized by
Or
The raw by introducing washing water into the fresh concrete residue con in the drum to form a separation product, the separating agent was charged with 1% to 3% of the amount of the capacity of the separation process was
It is characterized by this.
本発明にかかる生コン残渣の処理方法であれば、生コン車のドラム内を洗浄すると共に、前記ドラム内から生コンの残渣を取り出し、それを網目状のパイプロスクリーン上に載置して、砂利と砂とを回収する際、前記回収した砂利と砂には残渣のコンクリートが付着せず、そのため、土壌基準値以上の重金属も付着せず、もって、これら砂利や砂も産業廃棄物として処理せずにリサイクルして再利用でき、しかも、砂利や砂から分離した水についても，重金属が混入していないため下水として処理することができるとの優れた効果を奏する。
If it is a processing method of the ready-mixed residue concerning the present invention, while cleaning the inside of the drum of a ready-mixed car, taking out the residue of the ready-mixed concrete from the drum, placing it on a mesh-like pipeline screen, When collecting sand, residual concrete does not adhere to the collected gravel and sand, and therefore heavy metals exceeding the soil standard value do not adhere, and therefore these gravel and sand are not treated as industrial waste. In addition, the water separated from gravel and sand can be treated as sewage because it does not contain heavy metals.
以下、本発明を図に示す実施例に基づき説明する。 Hereinafter, the present invention will be described based on embodiments shown in the drawings.
図1は生コン残渣処理工程の一例を示すもので、符号１は生コン車を示す。
FIG. 1 shows an example of a raw concrete residue treatment process.
なお、本発明において、生コン残渣処理は、生コン車１の生コンドラム２に限定はされない。生コン車１に積まれていない生コンドラム２の生コン残渣処理にも適用されるものである。
In the present invention, the raw waste residue treatment is not limited to the raw concrete drum 2 of the raw
生コン車１は構築物の所定構築箇所に到着後、生コン車１から生コンを前記構築箇所へ送出する。
After the raw
その後、生コン車１側では、生コン残渣が残るドラム２内に、生コン残渣を水と固形物とに分離すべく分離剤を投入する作業を行う。
Thereafter, on the side of the ready-
ここで、分離剤の投入時期についても何ら限定がなく、生コンを搬入した現場での投入ではなく、生コン残渣処理場に帰社した後、分離剤を投入しても構わない。しかし、ドラム２内で生コン残渣が固まらないようドラム２は回転させておくことが必要である。 Here, there is no limitation as to the timing of feeding the separating agent, and the separating agent may be thrown in after returning to the raw-container residue treatment plant, instead of charging at the site where the raw-container is carried. However, it is necessary to rotate the drum 2 so that the raw food residue does not harden in the drum 2.
なお、前記分離剤の投入前には、前記ドラム２内に洗浄水を注入し、ドラム２内を洗浄するが、生コン残渣はドラム２内の壁面に付着して容易に剥がれない。 Before the separating agent is added, washing water is poured into the drum 2 to wash the inside of the drum 2, but the raw food residue is attached to the wall surface in the drum 2 and is not easily peeled off.
例えば、洗浄水の注入は、10トン車の生コン車１の場合は、ドラム２内で約３０リットルの容量となるまで行われることがある。そして、生コン残渣と水との割合は、例えば生コン残渣の固形物が１０％乃至２０％、水が８０％乃至８５％程度の割合となる。
For example, in the case of a live-
この３０リットルの容量に対し、分離剤は４００ｇ程度の投入となる。すなわち、分離剤の投入は、全体の容量の約１％乃至３％の分量で充分機能するものとなる。 About 400 g of the separating agent is charged for the capacity of 30 liters. That is, the input of the separating agent functions sufficiently in an amount of about 1% to 3% of the entire volume.
分離剤投入後は、生コン車１のドラム２を回転させる。例えば、生コン車１の帰社戻り運転中の時間を利用して、前記ドラム２を回転させても構わない。
After supplying the separating agent, the drum 2 of the ready-
そして、前記の回転作業により生コン残渣を水と砂利及び砂を含む生コン残渣固形物とに予めドラム２内で分離させるものとする。ここで、ドラム２を回転させる時間については何ら限定されないが、例えば数分間乃至数十分間で構わない。前記分離剤投入後、ドラム２を数分間乃至数十分間回転させることにより、分離剤がドラム内部のあらゆる箇所に行き渡り、水と砂利及び砂と重金属が封入された生コン残渣物とに分離させるものとなる。 And the quick- cone residue shall be previously isolate | separated in the drum 2 by the said rotation operation | work into the quick-concentration residue solid substance containing water and gravel and sand . Here, the time for rotating the drum 2 is not limited at all, but may be, for example, several minutes to several tens of minutes. After the separation agent dispenser, by rotating the drum 2 for several minutes to several tens minutes, separating agent spreads to every part of the internal drum, is separated into a ready mixed concrete residue product water and gravel and sand and heavy metals are encapsulated It will be a thing.
前記投入する分離剤は、ペーパースラッジが２８乃至６８重量部、無水石膏が１０乃至５０重量部、硫酸バンドが３乃至４３重量部、消石灰が８乃至４８重量部、ソーダ灰が０．４乃至２８重量部、ポルトランドセメントが０．３乃至２６重量部、高分子ポリマーが０．１乃至１１重量部、チオ硫酸ソーダが０．１５乃至２３重量部、硫酸第１鉄が０．１乃至２２重量部、シリカが０．０５乃至２１重量部、を含んで配合構成されている。この分離剤の詳細は後述する。 The separating agent to be added is 28 to 68 parts by weight of paper sludge, 10 to 50 parts by weight of anhydrous gypsum, 3 to 43 parts by weight of sulfuric acid band, 8 to 48 parts by weight of slaked lime, and 0.4 to 28 of soda ash. Parts by weight, 0.3 to 26 parts by weight of Portland cement, 0.1 to 11 parts by weight of polymer, 0.15 to 23 parts by weight of sodium thiosulfate, and 0.1 to 22 parts by weight of ferrous sulfate In addition, the silica is mixed to contain 0.05 to 21 parts by weight. Details of this separating agent will be described later.
帰社した生コン車１は図1に示すように、ドラム２内から前述の例えば３０リットルの生コン残渣が取り出され、例えば網目状に構成されたバイブロスクリーン３上に送出され、載置される。バイブロスクリーン３は水平方向に揺動され、バイブロスクリーン３の網目を抜けたコンクリート残渣や水は原水槽４に貯留される。
As shown in FIG. 1, for example, 30 liters of the ready-mixed raw residue is taken out from the drum 2 and returned to the
バイブロスクリーン３上には網目を通過しない砂利６が残り、該砂利６はベルトコンベア５を介して所定の回収箇所に回収される。
Gravel 6 that does not pass through the mesh remains on the
しかして、この砂利６には、前記分離剤が投入されたドラム２内でコンクリート残渣から確実に分離され、もって、重金属が混入したコンクリート残渣が付着せず、また、付着しても簡単に剥がれるものとなり、リサイクルできる砂利６となっている。 Thus, the gravel 6 is surely separated from the concrete residue in the drum 2 in which the separating agent is charged, so that the concrete residue mixed with heavy metal does not adhere, and even if it adheres, it easily peels off. It becomes gravel that can be recycled.
原水槽４に貯留された水とバイブロスクリーン３の網目を抜けたコンクリート残渣はポンプにより吸い上げられ、クラッシュファイヤー７に投入される。
The water stored in the raw water tank 4 and the concrete residue passing through the mesh of the
クラッシュファイヤー７内では、さらに水と重金属を含む生コン残渣と砂８とに分離され、前記砂８は重金属を含む生コン残渣と分離され、洗浄などを経てリサイクルが可能な砂８として回収される。 In the crush fire 7, it is further separated into raw concrete residue containing water and heavy metal and sand 8, and the sand 8 is separated from raw concrete residue containing heavy metal and recovered as sand 8 that can be recycled through washing or the like.
次に、水と重金属を含んだ生コン残渣はスラッジ水槽９に移送され、該スラッジ槽９内では撹拌機１０によって撹拌された後、ろ布などで形成されたフィルター内に移送され、このフィルタープレス１１内でプレス処理される。 Next, the ready-mixed residue containing water and heavy metal is transferred to a sludge water tank 9, stirred in the sludge tank 9 by a stirrer 10, and then transferred to a filter formed of a filter cloth or the like. 11 is pressed.
プレス処理されると、いわゆる重金属が含まれた生コン残渣からなる脱水ケーキ１２と重金属を含まない水１３とに分離され、この水１３は上澄水槽１４に送られた後、各箇所で再利用されるものとなる。
When it is pressed, it is separated into a
ここで、分離剤につき説明する。 Here, the separating agent will be described.
該分離剤は、まず、ペーパースラッジが２８乃至６８重量部、配合される。 The separating agent is first blended with 28 to 68 parts by weight of paper sludge.
このペーパースラッジ(paper sludge)は、例えば、製紙工程で排出される廃棄物であり、セルロースを含む繊維物が主成分であり、最近ではこれを焼却してできる炭化物(PSC)が更なる有効資源として注目されている。 This paper sludge is, for example, waste discharged in the papermaking process, and is mainly composed of fiber containing cellulose. Recently, carbon (PSC) produced by incineration of this is a more effective resource. It is attracting attention as.
そして、炭化させたペーパースラッジ灰(PSC)は、表面が多孔質になっていて、そのため、消臭剤・化学物質吸着材など多岐にわたる用途が期待されており、本発明ではこのペーパースラッジを２８乃至６８重量部、配合するものとする。 Carbonized paper sludge ash (PSC) has a porous surface, and therefore, it is expected to be used in a wide variety of applications such as deodorants and chemical adsorbents. From 68 parts by weight shall be blended.
次に、無水石膏が１０乃至５０重量部、配合される。無水石膏とは、結晶水を持たない硫酸カルシウムで、可溶性無水石膏（III型無水石膏）と不溶性無水石膏（II型無水石膏）がある。半水石膏を加熱（180℃〜190℃）して得られる可溶性無水石膏は、空気中の水分を吸着して半水石膏に戻る。一方、不溶性無水石膏は天然に存在するが、二水石膏を300℃〜700℃で焼成することでも得られる。不溶性無水石膏は水を加えても容易に水和反応しないが、凝結促進剤を加えて硬化させることができる。本発明では、可用性無水石膏が用いられるものとなる。 Next, 10 to 50 parts by weight of anhydrous gypsum is blended. Anhydrous gypsum is calcium sulfate without crystal water, and includes soluble anhydrite (type III anhydrite) and insoluble anhydrite (type II anhydrite). Soluble anhydrous gypsum obtained by heating hemihydrate gypsum (180 ° C. to 190 ° C.) adsorbs moisture in the air and returns to hemihydrate gypsum. On the other hand, insoluble anhydrous gypsum exists naturally, but it can also be obtained by baking dihydrate gypsum at 300 ° C to 700 ° C. Insoluble anhydrous gypsum does not readily hydrate when water is added, but can be cured by adding a setting accelerator. In the present invention, availability anhydrous gypsum is used.
また、硫酸バンドが３乃至４３重量部、配合される。当該硫酸バンドは、本発明において汚泥水中の浮遊物を沈降させるために用いられる。 In addition, 3 to 43 parts by weight of a sulfuric acid band is blended. The sulfuric acid band is used in the present invention to settle suspended matter in sludge water.
次に、消石灰が８乃至４８重量部、配合される。消石灰の原料は石灰石であり、該石灰石は粉砕・焼成・加水(消化)等の工程を経る事で、炭酸カルシウム(炭カル)、生石灰、消石灰と名前を変え、使用方法も変わる。生石灰に加水して消化、熟成させたものが消石灰となる。 Next, 8 to 48 parts by weight of slaked lime is blended. The raw material of slaked lime is limestone, and the limestone is renamed calcium carbonate (charcoal), quick lime, and slaked lime through processes such as pulverization, firing, and hydrolysis (digestion), and the usage method is also changed. What is hydrolyzed and digested and aged into quicklime is slaked lime.
CaO(酸化カルシウム)＋H2O(水)→Ca(OH)2(水酸化カルシウム)
形状は白色の微粉体で、粒径は150μm以下が主体となる。かさ比重は0.4〜0.55程度、難溶解性であるが、スラリーにすると強いアルカリ性を示す。
CaO (calcium oxide) + H 2 O (water) → Ca (OH) 2 (calcium hydroxide)
The shape is white fine powder, and the particle size is mainly 150 μm or less. The bulk specific gravity is about 0.4 to 0.55 and hardly soluble, but when it is made into a slurry, it shows strong alkalinity.
飲料水のpHは5.8〜8.6と規定されている為、原水の酸性度が高い場合に消石灰の強いアルカリ性を利用してpH調整(中和)目的に凝集池や沈殿池に注入される場合がある。但し、消石灰は粉体を溶解する手間がかかりハンドリングの悪さから原水のpH調整用途で使用されている現場は少なくなっている。むしろ赤水防止及び配管内壁に被膜を作る目的で配水池に消石灰を注入する事例が増えている。また、家庭から出た排水は下水処理場で処理されるが、反応槽で微生物により分解された汚泥を凝集沈殿させる際に、消石灰は、他の無機凝集剤等と併せて使用される。又、脱臭・殺菌目的で注入する場合もある。 Since the pH of drinking water is regulated between 5.8 and 8.6, when the raw water has high acidity, it may be injected into coagulation ponds or sedimentation basins for the purpose of pH adjustment (neutralization) using the strong alkalinity of slaked lime. is there. However, slaked lime is troublesome to dissolve the powder, and due to poor handling, the number of sites where it is used for pH adjustment of raw water is decreasing. Rather, there are an increasing number of cases where slaked lime is injected into the reservoir for the purpose of preventing red water and creating a coating on the inner wall of the pipe. In addition, wastewater discharged from households is treated in a sewage treatment plant, but slaked lime is used in combination with other inorganic flocculants and the like when coagulating and sedimenting sludge decomposed by microorganisms in a reaction tank. Moreover, it may inject | pour for the purpose of deodorizing and disinfection.
さらに、ゴミ焼却場等の排ガス中のSOxやHCl除去用途で消石灰が使用されており、またバグフィルターで回収した飛灰から砒素等の不純物が溶出するのを防止する目的で灰加湿器に粉末消石灰を供給する用途もある。ごみ固形燃料(RDF)成型用途では、殺菌作用を利用して微生物による発酵を抑える為に消石灰を混合する。 In addition, slaked lime is used to remove SOx and HCl in exhaust gas from garbage incinerators, and powder in ash humidifiers to prevent arsenic and other impurities from eluting from fly ash collected by bag filters. There is also an application to supply slaked lime. In refuse solid fuel (RDF) molding applications, slaked lime is mixed to suppress fermentation by microorganisms using sterilization.
その他、製糖工場で砂糖を精製する際に、高濃度の砂糖水溶液に消石灰を加え二酸化炭素(CO2)を吹き込み、炭酸カルシウム(CaCO3)を生成し、不純物を吸着して沈殿除去するのに使用されている。この様に、活躍の場面は多岐に渡り、本発明の分離剤においても汚泥水の存する固形物を凝集沈殿させるに際し重要な役目を果たしている。 In addition, when refining sugar in a sugar factory, slaked lime is added to a high-concentration sugar aqueous solution and carbon dioxide (CO 2 ) is blown to produce calcium carbonate (CaCO 3 ), which adsorbs impurities and removes precipitates. It is used. Thus, the scene of an activity is wide-ranging and the separation agent of the present invention also plays an important role in agglomerating and precipitating solids containing sludge water.
次に、ソーダ灰が０．４乃至２８重量部、配合される。ソーダ灰とは炭酸ナトリウムであり、当該ソーダ灰はガラス原料、石けん、洗剤、無機化学向け原料あるいは食品添加物用途など幅広い分野で利用される。本発明では、主に、水処理助剤として使用される。 Next, 0.4 to 28 parts by weight of soda ash is blended. Soda ash is sodium carbonate, and the soda ash is used in a wide range of fields including glass raw materials, soaps, detergents, raw materials for inorganic chemistry, and food additives. In the present invention, it is mainly used as a water treatment aid.
また、ポルトランドセメントが０．３乃至２６重量部、配合される。 Portland cement is blended in an amount of 0.3 to 26 parts by weight.
一般に「セメント」とは「ポルトランドセメント」を指標し、特に普通ポルトランドセメントを指している。これは、普通ポルトランドセメントの用途範囲が非常に広く、「オールラウンドなセメント」と指標されるからである。 In general, “cement” refers to “Portland cement”, and particularly ordinary Portland cement. This is because ordinary Portland cement has a very wide application range and is indicated as “all-round cement”.
しかしながら、本発明においてポルトランドセメントには、普通、早強、超早強、中庸熱、耐硫酸塩の各種ポルトランドセメントのいずれかの一種またはいずれかのセメントを選択して混合されたものを指標する。 However, in the present invention, the portland cement is usually, early strength, ultra-early strength, moderate heat, sulfate-resistant, or any one of the various portland cements selected or mixed. .
次に、高分子ポリマーが０．１乃至１１重量部、配合される。高分子ポリマーは、少ない使用量であっても優れた凝集効果を発揮する。またＰＨ値により効果の変化があり、中性からアルカリ性を示す汚泥水の分離処理に優れている。ここで高分子ポリマーとしてはアニオン系高分子ポリマーが好ましい。 Next, 0.1 to 11 parts by weight of the high molecular weight polymer is blended. The high molecular polymer exhibits an excellent aggregation effect even with a small amount of use. In addition, the effect varies depending on the PH value, and it is excellent in the separation treatment of sludge water exhibiting neutral to alkaline. Here, as the polymer, an anionic polymer is preferable.
次に、チオ硫酸ソーダが０．１５乃至２３重量部、配合される。チオ硫酸ソーダとは別名チオ硫酸ナトリウムとも称され、水処理助剤として使用される。 Next, 0.15 to 23 parts by weight of sodium thiosulfate is blended. Sodium thiosulfate is also called sodium thiosulfate and is used as a water treatment aid.
次に、硫酸第１鉄が０．１乃至２２重量部、配合される。硫酸第一鉄は、酸化第二鉄・紺青等の顔料・屎尿処理・産業廃水(ヘドロ等)の中和・凝集沈降剤・土壌改良剤などの多用途に対応する。脱硫及び脱臭効果に関し、本品は硫化水素・アンモニアを同時吸着する効果が優れており、屎尿並びに下水処理・鶏糞乾燥時の脱臭、魚腸骨処理工場の脱臭等と悪臭公害防止に最適とおいわれている。本発明において沈殿促進剤として機能するものとなる。 Next, 0.1 to 22 parts by weight of ferrous sulfate is added. Ferrous sulfate can be used for various purposes such as pigments such as ferric oxide and bitumen, treatment of human waste, neutralization of industrial wastewater (such as sludge), coagulating sedimentation agent, and soil conditioner. With regard to desulfurization and deodorization effects, this product is excellent in the effect of simultaneous adsorption of hydrogen sulfide and ammonia, and is said to be optimal for prevention of bad odor pollution such as deodorization during manure and sewage treatment / drying of chicken manure, deodorization in fish iliac treatment plant, etc. ing. In the present invention, it functions as a precipitation accelerator.
次に、シリカが０．０５乃至２１重量部を含んで配合される。クロロシラン類・珪酸ナトリウムなどから生産される二酸化珪素(SiO2)である。本発明において水処理助剤として使用される。 Next, silica is blended containing 0.05 to 21 parts by weight. Silicon dioxide (SiO2) produced from chlorosilanes and sodium silicate. In the present invention, it is used as a water treatment aid.
次に、図２を参照して本実施例の具体例を説明する。 Next, a specific example of this embodiment will be described with reference to FIG.
本実施例では、ペーパースラッジを６０ｇ、無水石膏を２０ｇ、硫酸バンドを１３ｇ、消石灰を５ｇ、ソーダ灰を１０ｇ、ポルトランドセメントを１５ｇ、高分子ポリマーを２ｇ、チオ硫酸ソーダを５ｇ、硫酸第１鉄を５ｇ、シリカを１５ｇ配合し、本発明による分離剤１５０ｇを生成した。 In this example, 60 g of paper sludge, 20 g of anhydrous gypsum, 13 g of sulfuric acid band, 5 g of slaked lime, 10 g of soda ash, 15 g of Portland cement, 2 g of high polymer, 5 g of sodium thiosulfate, ferrous sulfate 5 g and 15 g of silica were blended to produce 150 g of the separating agent according to the present invention.
そして、当該分離剤を例えば工場などあるいは建設現場などに生コンを供給した生コン車１のドラム２内の生コン残渣について適用した。
And the said separating agent was applied with respect to the raw concrete residue in the drum 2 of the raw
ドラム２内への洗浄水の注入は、ドラム２内で全体の容量が約３０リットルの容量となるまで行われる。そして、生コン残渣と水との割合は、例えば生コン残渣の固形物が約１５％乃至２０％、水が約８０％乃至８５％程度の割合となる。 The washing water is injected into the drum 2 until the total volume in the drum 2 reaches about 30 liters. The ratio of the raw kon residue to water is, for example, about 15% to 20% for the solid of the raw kon residue and about 80% to 85% for water.
この３０リットルの容量に対し、分離剤は４００ｇ程度の投入となる。すなわち、分離剤の投入は、全体の容量の約１％乃至３％の分量で充分機能するものとなる。 About 400 g of the separating agent is charged for the capacity of 30 liters. That is, the input of the separating agent functions sufficiently in an amount of about 1% to 3% of the entire volume.
そして、約４分間ドラム２を回転させると、水と砂利と砂と重金属を含んだ固形物とに分離した。該固形物は含水率８０％程度の固形物であり、充分に手で持てる程度に固まるものとなった。そしてその固形物内には六価クロムなどの重金属を閉じ込めることができた。よって分離した水、砂利、砂には前記重金属は土壌環境基準値以上は含まれていないものであった。
Then, when the drum 2 was rotated for about 4 minutes, it was separated into water, gravel, sand and solid matter containing heavy metal. The solid matter was a solid matter having a water content of about 80%, and became solid enough to be held by hand. And the heavy metal such as hexavalent chromium could be confined in the solid. Therefore, the separated heavy water, gravel and sand did not contain the heavy metal above the soil environmental standard value.
１ 生コン車
２ ドラム
３ バイブロスクリーン
４ 原水槽
５ ベルトコンベア
６ 砂利
７ クラッシュファイヤー
８ 砂
９ スラッジ水槽
１０ 撹拌機
１１ フィルタープレス
１２ 脱水ケーキ
１３ 水
１４ 上澄水槽
1 Raw concrete vehicle 2
Claims (3)
前記投入する分離剤は、ペーパースラッジが２８乃至６８重量部、無水石膏が１０乃至５０重量部、硫酸バンドが３乃至４３重量部、消石灰が８乃至４８重量部、ソーダ灰が０．４乃至２８重量部、ポルトランドセメントが０．３乃至２６重量部、高分子ポリマーが０．１乃至１１重量部、チオ硫酸ソーダが０．１５乃至２３重量部、硫酸第１鉄が０．１乃至２２重量部、シリカが０．０５乃至２１重量部、を含んで配合構成されてなり、
前記分離後、砂利及び砂と重金属が封入された生コン残渣物とがドラム内から取り出され、網目状に構成されたバイブロスクリーン上に送出され、前記バイブロスクリーンは水平方向に揺動され、バイブロスクリーンの網目を抜けた生コン残渣物や水は原水槽に貯留され、バイブロスクリーン上には網目を通過しない砂利が残り、該砂利はベルトコンベアを介して所定の回収箇所に回収され、重金属が混入した生コン残渣物が付着しない砂利となり、
原水槽に貯留された水とバイブロスクリーンの網目を抜けた生コン残渣物はポンプにより吸い上げられ、クラッシュファイヤーに投入され、クラッシュファイヤー内では、さらに水と重金属を含む生コン残渣物と砂とに分離され、前記砂は洗浄を経てリサイクルが可能な砂として回収され、水と重金属を含んだ生コン残渣物はスラッジ水槽に移送され、該スラッジ水槽内では撹拌された後、ろ布で形成されたフィルター内に移送され、該フィルター内でプレス処理され、重金属が含まれた生コン残渣物からなる脱水ケーキと重金属を含まない水とに分離され、該水は上澄水槽に送られた後、再利用される、
ことを特徴とする生コン残渣の処理方法。
After the raw concrete is sent from the raw concrete drum and carried to a predetermined construction location, the solid content of the raw concrete residue is 10% to 20% and the water is about 80% to 85% in the raw concrete drum where the raw concrete residue remains. Water is injected, and after the water injection, a separating agent that separates the biocon residue into water and solids is added, and after the separating agent is added, the biocon drum is rotated so that the biocon residue does not solidify, The ready- mixed residue is separated into water and ready- mixed residue solids containing gravel and sand in advance in the ready-mixed drum , and then the ready-mixed drum is further rotated to convert the ready-mixed residue solids containing gravel and sand into gravel and sand. And raw concrete residue encapsulated in heavy metal ,
The separating agent to be added is 28 to 68 parts by weight of paper sludge, 10 to 50 parts by weight of anhydrous gypsum, 3 to 43 parts by weight of sulfuric acid band, 8 to 48 parts by weight of slaked lime, and 0.4 to 28 of soda ash. Parts by weight, 0.3 to 26 parts by weight of Portland cement, 0.1 to 11 parts by weight of polymer, 0.15 to 23 parts by weight of sodium thiosulfate, and 0.1 to 22 parts by weight of ferrous sulfate In addition, the silica is mixed and composed of 0.05 to 21 parts by weight ,
After the separation, gravel and sand and raw concrete residue encapsulating heavy metal are taken out from the drum and sent out on a vibro screen having a mesh structure, and the vibro screen is swung horizontally, The raw concrete residue and water that have passed through the mesh are stored in the raw water tank, and gravel that does not pass through the mesh remains on the vibro screen, and the gravel is collected at a predetermined collection location via a belt conveyor and mixed with heavy metal. It becomes gravel where raw concrete residue does not adhere,
Water stored in the raw water tank and raw concrete residue that has passed through the mesh of the vibro screen are sucked up by a pump and put into a crash fire, and further separated into raw concrete residue containing water and heavy metals and sand in the crash fire. The sand is recovered as sand that can be recycled after washing, and the raw waste residue containing water and heavy metals is transferred to a sludge water tank and stirred in the sludge water tank, and then the filter is formed in a filter cloth. And is pressed in the filter, separated into dehydrated cake made of raw kon residue containing heavy metal and water not containing heavy metal, and the water is sent to the supernatant water tank and reused. The
The processing method of the raw concrete residue characterized by the above-mentioned.
前記投入する分離剤は、ペーパースラッジが２８乃至６８重量部、無水石膏が１０乃至５０重量部、硫酸バンドが３乃至４３重量部、消石灰が８乃至４８重量部、ソーダ灰が０．４乃至２８重量部、ポルトランドセメントが０．３乃至２６重量部、高分子ポリマーが０．１乃至１１重量部、チオ硫酸ソーダが０．１５乃至２３重量部、硫酸第１鉄が０．１乃至２２重量部、シリカが０．０５乃至２１重量部、を含んで配合構成されてなり、
前記分離後、砂利及び砂と重金属が封入された生コン残渣物とがドラム内から取り出され、網目状に構成されたバイブロスクリーン上に送出され、前記バイブロスクリーンは水平方向に揺動され、バイブロスクリーンの網目を抜けた生コン残渣物や水は原水槽に貯留され、バイブロスクリーン上には網目を通過しない砂利が残り、該砂利はベルトコンベアを介して所定の回収箇所に回収され、重金属が混入した生コン残渣物が付着しない砂利となり、
原水槽に貯留された水とバイブロスクリーンの網目を抜けた生コン残渣物はポンプにより吸い上げられ、クラッシュファイヤーに投入され、クラッシュファイヤー内では、さらに水と重金属を含む生コン残渣物と砂とに分離され、前記砂は洗浄を経てリサイクルが可能な砂として回収され、水と重金属を含んだ生コン残渣物はスラッジ水槽に移送され、該スラッジ水槽内では撹拌された後、ろ布で形成されたフィルター内に移送され、該フィルター内でプレス処理され、重金属が含まれた生コン残渣物からなる脱水ケーキと重金属を含まない水とに分離され、該水は上澄水槽に送られた後、再利用される、
ことを特徴とする生コン残渣の処理方法。
The ratio of 10% to 20% of the solid content of the raw kon residue and 80% to 85% of the water of the raw kon residue in the raw kon drum where the raw kon residue remains after the raw kon is sent from the raw kon drum of the raw kon car After the water injection, a separating agent that separates the biocon residue into water and solids is introduced, and after the separation agent is introduced, the biocon drum is rotated so that the biocon residue does not solidify. The raw kon residue is separated into water and gravel and sand-containing raw kon residue solids in advance in the raw kon drum , and then the raw kon drum is further rotated to remove the gravel and sand-containing kon residue solids. Separated into gravel and sand and raw concrete residue encapsulated with heavy metals ,
The separating agent to be added is 28 to 68 parts by weight of paper sludge, 10 to 50 parts by weight of anhydrous gypsum, 3 to 43 parts by weight of sulfuric acid band, 8 to 48 parts by weight of slaked lime, and 0.4 to 28 of soda ash. Parts by weight, 0.3 to 26 parts by weight of Portland cement, 0.1 to 11 parts by weight of polymer, 0.15 to 23 parts by weight of sodium thiosulfate, and 0.1 to 22 parts by weight of ferrous sulfate In addition, the silica is mixed and composed of 0.05 to 21 parts by weight ,
After the separation, gravel and sand and raw concrete residue encapsulating heavy metal are taken out from the drum and sent out on a vibro screen having a mesh structure, and the vibro screen is swung horizontally, The raw concrete residue and water that have passed through the mesh are stored in the raw water tank, and gravel that does not pass through the mesh remains on the vibro screen, and the gravel is collected at a predetermined collection location via a belt conveyor and mixed with heavy metal. It becomes gravel where raw concrete residue does not adhere,
Water stored in the raw water tank and raw concrete residue that has passed through the mesh of the vibro screen are sucked up by a pump and put into a crash fire, and further separated into raw concrete residue containing water and heavy metals and sand in the crash fire. The sand is recovered as sand that can be recycled after washing, and the raw waste residue containing water and heavy metals is transferred to a sludge water tank and stirred in the sludge water tank, and then the filter is formed in a filter cloth. And is pressed in the filter, separated into dehydrated cake made of raw kon residue containing heavy metal and water not containing heavy metal, and the water is sent to the supernatant water tank and reused. The
The processing method of the raw concrete residue characterized by the above-mentioned.
ことを特徴とする請求項１または請求項２記載の生コン残渣の処理方法。 The raw by introducing washing water into the fresh concrete residue con in the drum to form a separation product, the separating agent was charged with 1% to 3% of the amount of the capacity of the separation process was
The processing method of the raw kon residue of Claim 1 or Claim 2 characterized by the above-mentioned.
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