KR100334328B1 - Method for treating fly ash containing heavy metal and soil covering materials using solid materials produced by the method - Google Patents
Method for treating fly ash containing heavy metal and soil covering materials using solid materials produced by the method Download PDFInfo
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- KR100334328B1 KR100334328B1 KR1019990051689A KR19990051689A KR100334328B1 KR 100334328 B1 KR100334328 B1 KR 100334328B1 KR 1019990051689 A KR1019990051689 A KR 1019990051689A KR 19990051689 A KR19990051689 A KR 19990051689A KR 100334328 B1 KR100334328 B1 KR 100334328B1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- 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
- Y02W30/58—Construction or demolition [C&D] waste
Abstract
비산재의 고형화 처리시간을 단축시켜 처리능률을 향상시킬 수 있고, 고강도 압축을 통해 고형물 성형후 쉽게 깨지는 일이 없으며, 응고시간이 짧아 찌꺼기등이 주변에 달라붙지 않도록 함으로써 처리장치의 유지관리에 어려움이 없는 중금속 함유 비산재 처리방법 및 이 비산재 처리방법에 의해 제조된 고형물을 사용하는 복토재를 제공한다.It can improve the processing efficiency by shortening the solidification time of fly ash, and it is not easy to be broken after forming solids through high-strength compression, and it is difficult to maintain the processing equipment by preventing the residue from sticking around due to the short solidification time. Provided is a heavy metal-containing fly ash treatment method and a cover material using solids prepared by the fly ash treatment method.
본 발명의 중금속 함유 비산재 처리방법은, 비산재 100중량％당 액상의 점결제 15∼25중량％를 혼합하여 페이스트상태의 혼합물로 만드는 공정과, 상기 페이스트 상태의 혼합물을 롤압축성형기에 의해 1.5 ∼ 4 Ton/㎝ 압력으로 압축시켜 일정크기를 가지는 덩어리형태의 고형물로 만드는 공정으로 이루어진다. 또한, 이 처리방법에 의해 비산재의 입자 사이에 점결제가 충진됨으로써 각 비산재의 입자가 결합됨과 동시에, 점결제가 입자를 둘러싼 형태의 구조를 가지며 중금속의 용출이 억제되는 고형물을 얻을 수 있다.Heavy metal-containing fly ash treatment method of the present invention is a step of mixing 15 to 25% by weight of the liquid caking agent per 100% by weight of fly ash to form a paste mixture, and the mixture of the paste state 1.5 to 4 by a roll compression molding machine Compressed by Ton / ㎝ pressure to form a solid of a lump-like shape having a certain size. In addition, by the treatment method, the caking agent is filled between the particles of the fly ash, so that the particles of the fly ash are bonded to each other, and the solids having a structure in which the caking agent surrounds the particles and the elution of heavy metals are suppressed can be obtained.
Description
본 발명은 중금속 함유 비산재 처리방법 및 그 처리방법에 의해 제조된 고형물을 사용하는 복토재에 관한 것으로, 보다 상세하게는 폐기물 소각시 배기가스로부터 집진된 중금속 함유의 비산재(Fly Ash)를 환경오염 없이 안전하게 매립할 수 있고, 이 처리에 의해 생성된 고형물을 쓰레기 매립시의 복토재로 사용할 수 있는 중금속 함유 비산재 처리방법 및 그 처리방법에 의해 제조된 고형물을 사용하는 복토재에 관한 것이다.The present invention relates to a method for treating heavy metal-containing fly ash and a cover material using solids prepared by the method, and more particularly to safely remove heavy ash-containing fly ash collected from exhaust gas during incineration of waste without environmental pollution. The present invention relates to a method for treating heavy metal-containing fly ash, which can be embedded, and which solids produced by this treatment can be used as a cover material at the time of landfill, and a cover material using the solids produced by the treatment method.
일반적으로, 폐기물을 소각처리하게 되면, 더 이상 타지 않고 남는 재와, 소각과정에서 배기가스에 섞여 배기되는 비산재가 형성되고, 이 재들은 땅에 매립하여 처리하고 있다. 따라서 소각대상의 폐기물은, 소각후 발생하는 재를 매립하여도 환경오염이 없는 것으로 제한되고 있다.Generally, incineration of waste forms ash that is no longer burned and fly ash that is mixed with the exhaust gas during incineration, which is landfilled and disposed of. Therefore, the waste to be incinerated is limited to no environmental pollution even if the ash generated after incineration is buried.
그러나, 폐기물의 분리수거가 제대로 이루어지지 않기 때문에 소각시 유해물질을 생성하는 폐기물, 예들 들면, 밧데리, 깡통, PCB기판등과 같이 소각대상에서 제외된 오염원의 폐기물도 함께 섞여 소각되고 있는 실정이다.However, since the waste is not properly collected and collected, wastes that generate harmful substances during incineration, such as batteries, cans, PCB substrates, etc., are also incinerated by incineration of wastes that are excluded from incineration.
이러한 오염원의 폐기물을 소각처리하는 경우, 더 이상 타지 않는 재는 완전연소되어 유해물질이 제거된 상태이므로 그대로 매립하여도 환경을 오염시키지 않지만, 비산재는, 소각중에 배기되므로 완전히 연소되지 않은 중금속, 예를 들면, 납, 구리, 비소 카드뮴등의 성분을 함유하고 있으며, 이를 그대로 매립할 경우, 중금속 용출에 의해 토양 및 지하수를 오염시키는 환경오염의 원인이 된다.When incineration of wastes from these pollutants, the ashes that are no longer burned are completely burned and harmful substances are removed, so they do not pollute the environment even when they are landfilled, but fly ash is exhausted during incineration, so heavy metals that are not completely burned, For example, it contains components such as lead, copper, and arsenic cadmium, and when they are landfilled, it causes environmental pollution that contaminates soil and groundwater by leaching heavy metals.
따라서 종래에는 소각시 배기가스로부터 집진한 비산재를 시멘트와 섞어 페이스트(Paste)상태로 만들고, 압출성형기를 통해 일정한 굵기로 길게 압출성형함과 동시에 일정한 크기의 덩어리형태로 잘라 컨베이어로 건조실까지 운반하며, 건조실에서 일정시간 건조시킴으로써 양생하여 고형화한 후, 땅에 매립하고 있었다.Therefore, conventionally, the fly ash collected from the exhaust gas when incinerated is mixed with cement to form a paste, and is extruded to a certain thickness through an extruder, and at the same time, cut into a lump of a certain size and transported to a drying chamber by a conveyor. After curing and solidifying by drying in a drying room for a certain time, the soil was buried in the ground.
그러나 이러한 폐기물 처리방법은, 비산재와 시멘트를 혼합하여 양생하는 것이므로, 양생시간이 2∼3일간으로 매우 길어 처리능률이 저하된다. 또한 압출성형에 의해 덩어리형태로 만들어지므로, 압축력이 약하여 컨베이어를 통해 건조실로 운반되는 과정에서 작은 충격에 의해서도 쉽게 깨지거나, 덩어리끼리 서로 달라붙는 단점이 있다.However, this waste treatment method is to mix and cure fly ash and cement, so that curing time is very long (2 to 3 days), and treatment efficiency is lowered. In addition, since the extrusion is made in the form of lumps, there is a disadvantage that the compression force is weak and easily broken by a small impact in the process of being conveyed to the drying chamber through the conveyor, or the lumps stick together.
그리고 압출성형후 깨진 조각이나 찌꺼기들이 컨베이어등 주변장치에 달라붙어 굳어버리게 되므로, 수시로 컨베이어나 주변장치로부터 떼어내야 하는등 장치의 유지관리에 많은 어려움이 있으며, 심하게는 컨베이어등 주변장치의 고장을 유발하는 문제가 있다.In addition, broken pieces and debris stick to the peripheral devices such as conveyors and harden after extrusion, and thus, it is difficult to maintain the device such as having to detach them from the conveyors or peripheral devices from time to time. There is a problem.
본 발명은 상기와 같은 종래의 문제점을 해결하기 위한 것으로, 그 목적은 비산재의 고형화 처리시간을 단축시켜 처리능률을 향상시킬 수 있고, 고강도 압축을 통해 고형물 성형후 쉽게 깨지는 일이 없으며, 응고시간이 짧아 찌꺼기등이 주변에 달라붙지 않도록 함으로써 처리장치의 유지관리에 어려움이 없는 중금속 함유비산재 처리방법을 제공하는데 있다.The present invention is to solve the conventional problems as described above, the object is to shorten the solidification treatment time of fly ash to improve the treatment efficiency, and is not easily broken after forming a solid through high-strength compression, the solidification time is It is to provide a method for treating heavy metal-containing fly ash that is not difficult to maintain the treatment apparatus by preventing the residue from sticking around.
본 발명의 다른 목적은, 비산재 처리방법에 의해 제조된 고형물을 쓰레기 매립장에서 쓰레기를 매립할 때 1차적으로 쓰레기를 덮는데 사용하는 복토재로 이용함으로써 폐기물 재활용의 면에서 자재비용을 절감할 수 있는 비산재 처리방법에 의해 제조된 고형물을 사용하는 복토재를 제공하는데 있다.Another object of the present invention is to use a solid material produced by the fly ash disposal method as a cover material used to cover the waste primarily when the landfill in the landfill landfill waste, which can reduce the material cost in terms of waste recycling It is to provide a cover material using a solid produced by the treatment method.
도 1은 본 발명에 따른 비산재 처리방법의 처리공정을 나타낸 블록도.1 is a block diagram showing a processing step of the fly ash processing method according to the present invention.
도 2는 본 발명에 따른 비산재 처리방법에 의한 비산재의 고형화 상태를 나타낸 확대단면도.Figure 2 is an enlarged cross-sectional view showing the solidification state of fly ash by the fly ash processing method according to the present invention.
도 3은 본 발명에 따른 비산재 처리방법에서 비산재의 고형화에 사용되는 가압로울러를 나타낸 사시도.Figure 3 is a perspective view showing a pressure roller used for solidifying the fly ash in the fly ash processing method according to the present invention.
도 4는 본 발명에 따른 비산재 처리방법에 의해 제조된 복토재를 나타낸 사시도.Figure 4 is a perspective view showing the cover material produced by the fly ash processing method according to the present invention.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
1 : 점결제 2 : 비산재 입자1: caking agent 2: fly ash particles
3,4 : 압축프레스 로울러 5 : 고형물3,4: compression press roller 5: solid
상기의 목적을 달성하기 위한 본 발명의 중금속 함유 비산재 처리방법은, 비산재 100중량％당 액상의 점결제 15∼25중량％를 혼합하여 페이스트상태의 혼합물로 만드는 공정과, 상기 페이스트 상태의 혼합물을 롤압축성형기에 의해 1.5 ∼ 4 Ton/㎝ 압력으로 압축시켜 일정크기를 가지는 덩어리형태의 고형물로 만드는 공정으로 이루어진다.The heavy metal-containing fly ash treatment method of the present invention for achieving the above object is a step of mixing 15 to 25% by weight of a liquid caking additive per 100% by weight of fly ash to form a paste mixture, and the paste mixture in a roll Compression molding machine is compressed to 1.5 ~ 4 Ton / ㎝ pressure to make a solid in the form of agglomerate having a certain size.
또한 상기 비산재 처리방법에 의해 비산재의 입자 사이에 점결제가 충진됨으로써 각 비산재의 입자가 결합됨과 동시에, 점결제가 비산재의 입자를 둘러싼 형태의 구조를 가지는 고형물로 이루어지는 복토재로 구성된다.In addition, the filler is filled between the particles of the fly ash by the fly ash treatment method, the particles of each fly ash are bonded, and the binder is composed of a cover material consisting of a solid having a structure of the form surrounding the fly ash particles.
이하, 첨부도면에 의거하여 본 발명의 바람직한 실시형태에 관해서 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of this invention is described based on an accompanying drawing.
도 1은 본 발명에 따른 비산재 처리공정을 나타낸 블록도로서, 비산재 100중량％당 액상의 점결제 15∼25중량％를 혼합하여 페이스트상태의 혼합물을 만든다(공정 10). 가루상태의 비산재와 액상의 점결제를 혼합하여 믹싱하게 되면 페이스트 상태가 되고, 이 페이스트 상태는 도 2에 도시된 바와 같이 액상의 점결제(1)가 비산재의 입자(2) 사이의 공간을 충진하여 비산재의 입자(2)를 액상의 점결제(1)가 감싸는 형태의 구조가 되며, 액상의 점결제(1)는 응고시간이 짧기 때문에, 페이스트 상태에서도 응고가 진행되어 비산재의 입자(2) 상호간을 결합시킨다.Figure 1 is a block diagram showing a fly ash treatment process according to the present invention, by mixing 15 to 25% by weight of the liquid caking additive per 100% by weight fly ash (step 10). When mixing and mixing the powdered fly ash and the liquid caking agent, the paste state becomes a paste state. As shown in FIG. 2, the liquid caking agent 1 fills the space between the particles 2 of the fly ash. Therefore, the structure of the particle 2 of the fly ash is wrapped around the liquid caking agent 1, and since the solidification time of the liquid caking agent 1 is short, the solidification proceeds even in the paste state, so that the particles of the fly ash 2 are scattered. Unite with each other.
이때 액상의 점결제를 비산재 100중량％당 15중량％ 이하로 설정하는 경우에는, 액상의 점결제가 비산재 입자 사이의 공간에 충분이 충진되지 않기 때문에 전체적으로 결합력이 약하여 쉽게 분리되는 등 고형화가 곤란하고, 액상의 점결제를 25중량％ 이상으로 설정하는 경우에는, 수분이 많아 액상의 점결제의 응고시간이 길어지므로 고형화 시간이 길어진다.In this case, when the liquid binder is set to 15% by weight or less per 100% by weight of fly ash, since the liquid binder is not sufficiently filled in the spaces between the fly ash particles, the overall binding strength is weak and it is difficult to solidify easily. When the liquid caking agent is set to 25% by weight or more, the solidification time is long because the moisture content is large and the solidification time of the liquid caking agent becomes long.
따라서 액상의 점결제는 15∼25중량％로 설정하는 것이 좋고, 액상의 점결제로는 예를들면 Na2Sx등의 킬레이트(Chelate)를 사용하며, 이 킬레이트에 물을 혼합하여 사용하는 것이 바람직하다.Therefore, the liquid binder is preferably set to 15 to 25% by weight, and as the liquid binder, for example, a chelate such as Na 2 Sx is used, and water is preferably mixed with the chelate. Do.
킬레이트와 물의 혼합비율은 킬레이트 4∼10중량％, 물 8∼18중량％, 바람직하게는 킬레이트 7중량％, 물 13중량％로 설정하는 것이 좋다.The mixing ratio of chelate and water is set to 4 to 10% by weight of chelate, 8 to 18% by weight of water, preferably 7% by weight of chelate, and 13% by weight of water.
이어서 페이스트 상태의 혼합물을 압축프레스 로울러를 이용하여 1.5 ∼ 4 Ton/㎝ 압력으로 일정한 크기를 가지는 덩어리형태로 성형한다(공정 20). 즉 도 3에 도시된 바와 같이 2개의 압축로울러(3,4)의 둘레면을 따라 페이스트 상태의 혼합물을 덩어리형태로 성형하기 위한 대응형상의 홈(3a,4a)들을 형성하고, 이 2개의 압축로울러(3,4) 사이에 화살표a로 표시된 바와 같이 페이스트 상태의 혼합물을 투입함과 동시에, 2개의 압축로울러(3,4)를 화살표 b,c방향으로 회전시키게 되면, 페이스트상태의 혼합물이 2개의 압축로울러(3,4)에 의해 강하게 압축되어 도 4에 도시된 바와 같은 덩어리형태의 고형물(5)을 형성하게 된다.Subsequently, the mixture in a paste state is formed into a lump having a constant size at a pressure of 1.5 to 4 Ton / cm using a compression press roller (step 20). That is, as shown in Fig. 3, corresponding grooves 3a and 4a are formed along the circumferential surfaces of the two compression rollers 3 and 4 to form a mixture of the paste state in the form of agglomerates. When the paste mixture is introduced between the rollers 3 and 4 as indicated by the arrow a, and the two compression rollers 3 and 4 are rotated in the directions of the arrows b and c, the mixture in the paste state is 2 It is strongly compressed by the two compression rollers 3 and 4 to form a solid 5 in the form of a mass as shown in FIG.
이와 같이 페이스트상태의 혼합물을 압축프레스 로울러(3,4)로 강하게 압축하면, 비산재의 입자(2)와 입자(2)가 더욱 강하게 결합되어 고형물상태에서 쉽게 깨지는 일이 없으며, 따라서 비산재의 입자를 감싸고 있는 점결제에 의해 비산재에 함유된 중금속, 예를 들면 납, 구리, 비소 카드뮴등의 용출이 억제된다.In this way, if the mixture in the paste state is strongly compressed by the compression press rollers 3 and 4, the particles 2 and 2 of the fly ash are more strongly bonded and do not easily break in the solid state, and thus the particles of the fly ash are not easily broken. Elution of heavy metals contained in fly ash, such as lead, copper, arsenic cadmium, etc., is suppressed by the encapsulating binder.
또한, 액상의 점결제는 비산재와의 혼합공정에서 어느 정도 응고된 후, 압축공정에서 거의 응고된 상태가 되므로 압축프레스 로울러(3,4)에 의한 고형물 성형후 대략 1분내에 완전 응고되어 별도의 건조공정이 필요없고, 압축프레스 로울러에 의한 고형물 성형시 발생하는 찌꺼기가 주변장치에 달라붙는 일이 없다.In addition, since the liquid binder solidifies to some extent in the mixing process with the fly ash and becomes almost solidified in the compression process, the liquid binder is completely solidified within about 1 minute after forming the solid by the compression press rollers (3, 4). No drying process is required, and no debris from forming solids by the compression press roller is attached to the peripheral device.
이어서 스크린을 통해 압축프레스 로울러에 의해 성형된 고형물과, 압축과정에서 발생하는 찌꺼기를 분리하고, 찌꺼기는 혼합공정으로 보내어 재혼합함으로써 다시 고형물로 성형될 수 있도록 한다(공정 30).Subsequently, the solid formed by the compression press roller and the residue generated during the compression process are separated through the screen, and the residue is sent to the mixing process so as to be remixed to form the solid again (step 30).
상기와 같은 비산재 처리방법에 의해 고형물을 성형하여 중금속의 용출량을 실험하였다.Solids were molded by the fly ash treatment method as described above to test the elution of heavy metals.
실험예 1Experimental Example 1
비산재 100중량％당 점결제 20중량％로 하고, 점결제로서 킬레이트인 Na2Sx 5중량％, 물 15중량％를 혼합하여 페이스트 상태로 한 후, 압축프레스 로울러로 압축성형하여 고형물을 제조하고, 폐기물 공정시험법에 의하여 용출수를 검출하였다.20 weight% of a binder per 100 weight% of fly ash is mixed, 5 weight% of Na 2 Sx and 15 weight% of water as a binder are mixed to form a paste, followed by compression molding with a compression press roller to prepare a solid. Elution water was detected by the waste process test method.
그 결과 하기의 표에서와 같이, Cu는 0.038㎎/ℓ, Pb는 1.869㎎/ℓ, Cr+는 0.172㎎/ℓ로서, 각각 폐기물관리법에서 규정하는 기준치보다 낮은 것으로 나타났고, Cd, Hg, CN-, As는 검출되지 않았다. 이로써 본 실험예에서는 비산재의 입자를 둘러싸고 있는 점결제에 의해 중금속의 용출이 억제됨을 알 수 있었고, 용출수로 인한 환경오염의 염려가 없는 것으로 나타났다.As a result, as shown in the following table, Cu was 0.038 mg / l, Pb was 1.869 mg / l, Cr + 0.172 mg / l, which was lower than the standard value prescribed in the Waste Management Act. - , As was not detected. As a result, in the present experimental example, it was found that elution of heavy metals was suppressed by the caking agent surrounding the particles of fly ash, and there was no concern about environmental pollution due to elution water.
실험예 2Experimental Example 2
비산재 100중량％당 점결제 17중량％로 하고, 점결제로서 킬레이트인 Na2Sx 7중량％, 물 10중량％를 혼합하여 페이스트 상태로 한 후, 압축프레스 로울러로 압축성형하여 고형물을 제조하고, 폐기물 공정시험법에 의하여 용출수를 검출하였다.With fly ash 100% by weight of binder 17% by weight sugar, and as a binder a chelate of Na 2 Sx 7% by weight, and then a paste state by mixing water, 10% by weight, to prepare a solid compression-molded by a compression press roller, Elution water was detected by the waste process test method.
그 결과 하기의 표에서와 같이, Cu는 2.23㎎/ℓ, Pb는 0.29㎎/ℓ, Cd는 0.01㎎/ℓ로서, 각각 폐기물관리법에서 규정하는 기준치보다 낮은 것으로 나타났고, Hg, Cr+, CN-, As는 검출되지 않았다. 이로써 본 실험예에서도 비산재의 입자를 둘러싸고 있는 점결제에 의해 중금속의 용출이 억제됨을 알 수 있었고, 용출수로 인한 환경오염의 염려가 없는 것으로 나타났다.As a result of the table in to, Cu is 2.23㎎ / ℓ, Pb is 0.29㎎ / ℓ, Cd has appeared to be lower than the reference value specified in the respective waste management as 0.01㎎ / ℓ, Hg, Cr +, CN - , As was not detected. As a result, in the present experimental example, it was found that the elution of heavy metals was suppressed by the caking agent surrounding the fly ash particles, and there was no fear of environmental pollution due to the elution water.
실험예 3Experimental Example 3
비산재 100중량％당 점결제 25중량％로 하고, 점결제로서 킬레이트인 Na2Sx 7중량％, 물 18중량％를 혼합하여 페이스트 상태로 한 후, 압축프레스 로울러로 압축성형하여 고형물을 제조하고, 폐기물 공정시험법에 의하여 용출수를 검출하였다.25 wt% of caking agent per 100 wt% of fly ash is mixed, and 7 wt% of Na 2 Sx and 18 wt% of water, which are chelates as a caking agent, are mixed to form a paste, followed by compression molding with a compression press roller to prepare a solid. Elution water was detected by the waste process test method.
그 결과 하기의 표에서와 같이, Cu는 0.10㎎/ℓ, Pb는 1.00㎎/ℓ, Cd 0.06㎎/ℓ로서, 각각 폐기물관리법에서 규정하는 기준치보다 낮은 것으로 나타났고, Hg, Cr+, CN-, As는 검출되지 않았다. 이로써 본 실험예에서도 비산재의 입자를 둘러싸고 있는 점결제에 의해 중금속의 용출이 억제됨을 알 수 있었고, 용출수로 인한 환경오염의 염려가 없는 것으로 나타났다.As a result of the table in to, Cu is 0.10㎎ / ℓ, Pb is 1.00㎎ / ℓ, Cd as 0.06㎎ / ℓ, appeared to be lower than the reference value, respectively defined in the Waste Management Act, Hg, Cr +, CN - , As was not detected. As a result, in the present experimental example, it was found that the elution of heavy metals was suppressed by the caking agent surrounding the fly ash particles, and there was no fear of environmental pollution due to the elution water.
실험예 4Experimental Example 4
비산재 100중량％당 점결제 23중량％로 하고, 점결제로서 킬레이트인 Na2Sx 7중량％, 물 16중량％를 혼합하여 페이스트 상태로 한 후, 압축프레스 로울러로 압축성형하여 고형물을 제조하고, 폐기물 공정시험법에 의하여 용출수를 검출하였다.23 weight% of a binder per 100 weight% of fly ash is mixed, and 7 weight% of Na 2 Sx and 16 weight% of water, which are chelates, are mixed to form a paste, followed by compression molding with a compression press roller to prepare a solid. Elution water was detected by the waste process test method.
그 결과 하기의 표에서와 같이, Cu는 0.08㎎/ℓ, Pb는 0.60㎎/ℓ, Cd 0.05㎎/ℓ로서, 각각 폐기물관리법에서 규정하는 기준치보다 낮은 것으로 나타났고, Hg, Cr+, CN-, As는 검출되지 않았다. 이로써 본 실험예에서도 비산재의 입자를 둘러싸고 있는 점결제에 의해 중금속의 용출이 억제됨을 알 수 있었고, 용출수로 인한 환경오염의 염려가 없는 것으로 나타났다.As a result, Cu, 0.08 mg / l, Pb, 0.60 mg / l, and Cd 0.05 mg / l, respectively, were lower than the standard values prescribed in the Waste Management Act. Hg, Cr + , CN − , As was not detected. As a result, in the present experimental example, it was found that the elution of heavy metals was suppressed by the caking agent surrounding the fly ash particles, and there was no fear of environmental pollution due to the elution water.
<표><Table>
(※용출량 단위 ㎎/ℓ)(※ elution unit mg / l)
또한 본 발명은 상기와 같은 처리방법에 의하여 비산재의 입자 사이에 점결제가 충진됨으로써 각 비산재 입자가 결합됨과 동시에, 점결제가 입자를 둘러싼 형태의 구조를 가지는 고형물을 얻을 수 있다. 이 고형물은 땅에 매립시 중금속의 용출이 억제되므로, 고형물을 작게 형성하게 되면, 쓰레기 매립시 쓰레기를 1차적으로 덮는 복토제로 사용하는 것이 가능하게 되고, 이로써 쓰레기 매립시의 복토작업과 비산재의 매립작업이 동시에 이루어져 폐기물처리가 매우 효율적이고 경제적으로 되는 잇점이 있다.In addition, according to the present invention, the binder is filled between the particles of the fly ash by the treatment method as described above, and each fly ash particle is bonded, and a solid having a structure in which the binder surrounds the particles can be obtained. Since the solids are suppressed from the leaching of heavy metals when they are buried in the ground, if the solids are formed small, it is possible to use them as a cover material that covers the wastes at the time of landfilling. The work is done simultaneously, which makes the waste disposal very efficient and economical.
이상에서 설명한 바와 같이, 본 발명에 의하면, 비산재의 고형화 처리시간이 단축되어 비산재의 처리능률이 향상되고, 비산재의 입자들이 고강도 압축을 통해 더욱 강하게 결합되므로 쉽게 깨지는 일이 없으며, 점결제의 응고시간이 짧아서 비산재의 처리도중 처리장치에 달라붙는 일이 없어 처리장치의 유지관리에 어려움이 없다.As described above, according to the present invention, the solidification treatment time of the fly ash is shortened to improve the processing efficiency of the fly ash, and the particles of the fly ash are more strongly bonded through high-strength compression, so that it is not easily broken, and the solidification time of the binder This short, no sticking to the processing device during the processing of fly ash, there is no difficulty in maintenance of the processing device.
또한, 비산재 처리에 의해 제조된 고형물은 쓰레기 매립시 쓰레기를 1차적으로 덮는 복토재로 사용됨으로써 폐기물 재활용의 측면에서 산업상 유용하고 자재비용이 절감될 뿐만 아니라, 비산재 처리후의 매립작업과, 쓰레기 복토작업이 동시에 이루어지므로 매우 효율적이고 경제적인 효과가 있다.In addition, the solids produced by fly ash processing are used as cover materials covering the wastes at the time of landfill disposal, which is industrially useful in terms of waste recycling, and material costs are reduced, as well as landfill after fly ash processing and waste cover work. At the same time, it is very efficient and economical.
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| JPS5867389A (en) * | 1981-10-19 | 1983-04-21 | Nippon Riyuutsuu Kk | Method and agent for non-polluting treatment of industrial waste containing harmful material such as heavy metal |
| JPS63205192A (en) * | 1987-02-20 | 1988-08-24 | Mitsubishi Heavy Ind Ltd | Treatment of incinerated fly ash |
| JPH0679254A (en) * | 1992-07-14 | 1994-03-22 | Nippon Soda Co Ltd | Treating method to make fly ash harmless |
| JPH06277646A (en) * | 1993-03-26 | 1994-10-04 | Shinnihonkai Jukogyo Kk | Immobilization of heavy metal of waste refuse incineration fly ash |
| JPH06277647A (en) * | 1993-03-30 | 1994-10-04 | Ebara Infilco Co Ltd | Treatment of heavy metal-containing ash |
| JPH0866671A (en) * | 1993-12-16 | 1996-03-12 | Nippon Soda Co Ltd | Method for fixing heavy metal by hydrothermal treatment of fly ash |
| JPH09108648A (en) * | 1995-10-23 | 1997-04-28 | Hitachi Zosen Corp | Treating device for kneading ash |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5867389A (en) * | 1981-10-19 | 1983-04-21 | Nippon Riyuutsuu Kk | Method and agent for non-polluting treatment of industrial waste containing harmful material such as heavy metal |
| JPS63205192A (en) * | 1987-02-20 | 1988-08-24 | Mitsubishi Heavy Ind Ltd | Treatment of incinerated fly ash |
| JPH0679254A (en) * | 1992-07-14 | 1994-03-22 | Nippon Soda Co Ltd | Treating method to make fly ash harmless |
| JPH06277646A (en) * | 1993-03-26 | 1994-10-04 | Shinnihonkai Jukogyo Kk | Immobilization of heavy metal of waste refuse incineration fly ash |
| JPH06277647A (en) * | 1993-03-30 | 1994-10-04 | Ebara Infilco Co Ltd | Treatment of heavy metal-containing ash |
| JPH0866671A (en) * | 1993-12-16 | 1996-03-12 | Nippon Soda Co Ltd | Method for fixing heavy metal by hydrothermal treatment of fly ash |
| JPH09108648A (en) * | 1995-10-23 | 1997-04-28 | Hitachi Zosen Corp | Treating device for kneading ash |
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