KR100617243B1 - Electrodewatering method for high efficiency of sludge dewatering - Google Patents
Electrodewatering method for high efficiency of sludge dewatering Download PDFInfo
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- KR100617243B1 KR100617243B1 KR1020040108698A KR20040108698A KR100617243B1 KR 100617243 B1 KR100617243 B1 KR 100617243B1 KR 1020040108698 A KR1020040108698 A KR 1020040108698A KR 20040108698 A KR20040108698 A KR 20040108698A KR 100617243 B1 KR100617243 B1 KR 100617243B1
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- 239000010802 sludge Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000005684 electric field Effects 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 239000006227 byproduct Substances 0.000 claims abstract description 5
- 238000005086 pumping Methods 0.000 claims abstract description 3
- 230000018044 dehydration Effects 0.000 claims description 41
- 238000006297 dehydration reaction Methods 0.000 claims description 41
- 238000002203 pretreatment Methods 0.000 claims description 3
- 239000010419 fine particle Substances 0.000 claims description 2
- 238000005054 agglomeration Methods 0.000 claims 1
- 230000002776 aggregation Effects 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 6
- 238000004064 recycling Methods 0.000 abstract description 4
- 239000000701 coagulant Substances 0.000 abstract description 3
- 238000001962 electrophoresis Methods 0.000 abstract description 3
- 238000005345 coagulation Methods 0.000 abstract description 2
- 230000015271 coagulation Effects 0.000 abstract description 2
- 238000005370 electroosmosis Methods 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 229920006317 cationic polymer Polymers 0.000 description 13
- 230000000694 effects Effects 0.000 description 11
- 239000002245 particle Substances 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000003814 drug Substances 0.000 description 4
- 229940079593 drug Drugs 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011236 particulate material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000004566 building material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- -1 feed Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/006—Electrochemical treatment, e.g. electro-oxidation or electro-osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/06—Filters making use of electricity or magnetism
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/123—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using belt or band filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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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
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
본 발명은 전기탈수방법에 관한 것으로, 철강 부산물인 슬러지를 탈수하는 전기탈수방법에 있어서, 수거된 슬러지에 응집제를 50~100ppm 투입하여 극미세입자를 일정크기로 응집하는 전처리하는 과정과; 전처리된 슬러지를 펌핑하여 여과판 내부로 장입시킨 후 직류발생기를 통해 직류전압을 60~150V로 상기 여과판 내부에 설치된 전극판에 인가하여 상기 여과판에 전기장을 형성하는 과정과; 전기장을 형성시킴과 동시에 가압실린더를 작동시켜 상기 여과판을 2~5 bar로 가압하여 탈수하는 과정을 포함하여 이루어진다.The present invention relates to an electric dewatering method, the electric dewatering method for dewatering sludge which is a by-product of steel, comprising: pre-treating a coagulation agent to a predetermined size by injecting a coagulant into the collected sludge to a predetermined size; Pumping the pretreated sludge into the filter plate and applying a DC voltage to the electrode plate installed in the filter plate at 60 to 150V through a DC generator to form an electric field in the filter plate; Forming an electric field and simultaneously operating the pressure cylinder to pressurize the filter plate to 2 ~ 5 bar to dehydrate.
본 발명은 슬러지 전처리를 위한 약품을 줄일 수 있어 비용절감의 효과가 기대되고, 전기세기에 따라 탈수효율이 상승되므로 필요로 하는 탈수효율을 용이하게 조절할 수 있으며, 탈수효율이 높아 슬러지의 재활용율을 향상시키는 효과가 있다.The present invention can reduce the chemicals for the sludge pretreatment is expected to reduce the cost, the dewatering efficiency is increased according to the electric strength can be easily adjusted, the dewatering efficiency can be easily adjusted, the dewatering efficiency is high, the sludge recycling rate It is effective to improve.
전기탈수, 전기이동, 전기삼투, 전처리, 응집제, 여과판Electrodehydration, Electrophoresis, Electroosmosis, Pretreatment, Coagulant, Filter Plate
Description
도 1 및 도 2는 본 발명에 따른 전기탈수방법을 설명하기 위한 예시적인 개념도,1 and 2 is an exemplary conceptual diagram for explaining the electric dewatering method according to the invention,
도 3은 본 발명에 따른 전기탈수방법을 설명하기 위한 개략적인 장치 구성도,3 is a schematic configuration diagram for explaining the electric dewatering method according to the present invention,
도 4는 도 3의 여과판에 대한 상세도,4 is a detailed view of the filter plate of FIG.
도 5는 본 발명에 따른 전기탈수시 전처리 약품에 대한 영향을 시험한 그래프,Figure 5 is a graph of the test of the effect on the pretreatment chemicals during electrical dehydration according to the present invention,
도 6은 본 발명에 따른 전기탈수시 전기강도에 대한 영향을 시험한 그래프,Figure 6 is a graph that test the effect on the electrical strength during electrical dehydration according to the present invention,
도 7은 본 발명에 따른 전기탈수시 전처리 탈수압력에 대한 영향을 시험한 그래프.Figure 7 is a graph of the test of the effect on the pre-treatment dehydration pressure during electrical dehydration according to the present invention.
♧ 도면의 주요 부분에 대한 부호의 설명 ♧♧ description of the symbols for the main parts of the drawing ♧
100....탈수기지지대 110....여과판이동대100 ...
120....가압실린더 130....여과판120 ....
140....직류발생기 150....전선140 ...
본 발명은 전기탈수방법에 관한 것으로, 보다 상세하게는 산업설비에서 발생되는 슬러지를 전기탈수기를 이용하여 적절한 전처리와 전기강도 및 탈수압력을 가해 탈수효율을 향상시킴으로써 소각되거나 매립처리되던 슬러지를 효율적으로 재활용할 수 있도록 한 슬러지 탈수효율 향상을 위한 전기탈수방법에 관한 것이다.The present invention relates to an electrical dewatering method, and more particularly, sludge generated in an industrial facility by applying an appropriate pretreatment and electric strength and dehydration pressure by using an electric dehydrator to improve the dewatering efficiency to efficiently incinerated or landfilled sludge The present invention relates to an electrical dewatering method for improving sludge dewatering efficiency for recycling.
국내 폐기물 총 발생량의 12%에 이르는 산업 부산물인 슬러지는 1999년 한해동안 유기성 약 590만톤과 무기성 약 220만톤이 발생되었으며, 발생된 슬러지 처리비용은 2,400억원∼4,000억원에 이르고 있는 실정이다.Sludge, which is an industrial by-product of 12% of the total amount of domestic waste generated, generated about 5.9 million tons of organic and about 2.2 million tons of inorganic during 1999. The sludge treatment cost is between 240 billion and 400 billion won.
이와 같은, 슬러지 폐기물은 일반 폐기물과는 달리 매립 및 소각처리가 어려운데, 이것은 슬러지에 함유된 유해물질 때문이기도 하지만 보다 중요한 것은 수분 때문으로 슬러지의 수분이 많을 경우 유해성분인 강알카리성 침출수 발생량이 많으며, 또한 소각비용도 추가로 소요되기 때문이다.Such sludge wastes are difficult to landfill and incinerate, unlike general wastes, which are also due to the harmful substances contained in the sludge, but more importantly, due to moisture, a large amount of strong alkaline leachate, which is a harmful component, is generated when the sludge is too moist. In addition, incineration costs are additional.
따라서, 경제적이고 고효율의 슬러지탈수 기술은 슬러지가 발생되는 모든 사업장에 요구되는 기술일 뿐 만 아니라, 우리나라의 공공 및 사설 슬러지 처리 처분 사업장의 슬러지 폐기물 처리비용 절감과 탈수기 및 탈수설비 제작업 및 슬러지를 이용하여 비료, 사료, 건축재료, 토양개량재 등을 제조하는 슬러지 재활용 업체에 필요한 기반기술이다.Therefore, economical and high-efficiency sludge dewatering technology is not only required for all sludge-generating worksites, but also the cost reduction of sludge waste disposal and the dehydrator and dewatering equipment manufacturing and sludge of our public and private sludge treatment disposal sites. It is a basic technology for sludge recycling companies that manufacture fertilizers, feed, building materials, and soil improvement materials.
그러나, 현재 슬러지 탈수에 적용하고 있는 방법은 필터프레스, 벨트프레스, 진공필터 등의 방식으로 기계적인 힘에 의해 슬러지를 탈수하고 있기 때문에 효율 이 낮고, 에너지 소비가 많은 단점이 있었다.However, the method currently applied to sludge dewatering has the disadvantages of low efficiency and high energy consumption because the sludge is dewatered by mechanical force such as filter press, belt press and vacuum filter.
즉, 단순히 기계적 압력에 의해 슬러지를 탈수하므로 슬러지의 입자가 여과액과 함께 이동하여 여과포를 막는 현상이 쉽게 일어나는데, 이를 극복하기 위해 기계적으로 고압을 가하면 여과포가 손상될 뿐만 아니라 에너지가 많이 소요되고, 탈수설비의 정비주기가 잦아지게 된다.That is, since the sludge is dehydrated simply by mechanical pressure, the particles of the sludge move together with the filtrate to easily block the filter cloth. When the high pressure is mechanically applied to overcome this, the filter cloth is damaged and energy is consumed. The maintenance cycle of dehydration equipment becomes frequent.
뿐만 아니라, 전처리 공정에서 사용되는 화학약품의 양은 일반수처리 공정에 비해 탈수과정에서 사용되는 것이 매우 많은데, 보통 수처리 공정에서는 1-2ppm 정도의 약품이 응집작용을 위해 사용되나 슬러지 전처리를 위해서는 300-500ppm 정도의 약품이 사용되므로 약품의 가격(1000-5000원/kg)도 만만치 않은 비용을 치러야 한다.In addition, the amount of chemical used in the pretreatment process is much higher in the dehydration process than in the general water treatment process. In the water treatment process, about 1-2ppm of chemicals are used for flocculation but 300-500ppm for sludge pretreatment. Because the amount of medicine is used, the price of the drug (1000-5000 won / kg) also has to pay a formidable cost.
결국, 고효율적으로 탈수할 수 있는 새로운 형태의 탈수기술이 절실히 요청되고 있는 실정이다.As a result, there is an urgent need for a new type of dehydration technology that can dewater efficiently.
본 발명은 상술한 바와 같은 종래 기술이 갖는 제반 문제점을 감안하여 이를 해결하고자 창출한 것으로, 전기이동성이나 혹은 전기삼투성에 의한 전기탈수방법을 이용하여 산업 부산물로 발생되는 슬러지를 높은 탈수효율로 탈수하여 그 효용을 높임으로써 자원을 재활용할 수 있도록 함과 동시에 소각, 매립에 따른 환경오염도 억제시킬 수 있도록 한 슬러지 탈수효율 향상을 위한 전기탈수방법을 제공함에 그 주된 목적이 있다.The present invention has been made in view of the above-described problems of the prior art, to solve this problem, by using the electrodehydration method of electrophoresis or electroosmotic dewatering sludge generated as industrial by-products with high dewatering efficiency Its main purpose is to provide an electric dewatering method for improving the sludge dewatering efficiency, which makes it possible to recycle resources by increasing its utility and to suppress environmental pollution due to incineration and landfill.
본 발명은 상기한 기술적 과제를 달성하기 위하여, 철강 부산물인 슬러지를 탈수하는 전기탈수방법에 있어서, 수거된 슬러지에 양이온 고분자 응집제를 50~100ppm 투입하여 극미세입자를 일정크기로 응집하는 전처리하는 과정과; 전처리된 슬러지를 펌핑하여 여과판 내부로 장입시킨 후 직류발생기를 통해 직류전압을 60~150V로 상기 여과판 내부에 설치된 전극판에 인가하여 상기 여과판에 전기장을 형성하는 과정과; 전기장을 형성시킴과 동시에 가압실린더를 작동시켜 상기 여과판을 2~5 bar로 가압하여 탈수하는 과정을 포함하여 이루어지는 슬러지 탈수효율 향상을 위한 전기탈수방법을 제공함에 그 특징이 있다.In the present invention, in order to achieve the above technical problem, in the electrical dewatering method for dewatering the sludge which is a by-product of steel, the process of pre-treating the coagulation of ultrafine particles to a predetermined size by adding 50 ~ 100ppm of cationic polymer flocculant to the collected sludge; ; Pumping the pretreated sludge into the filter plate and applying a DC voltage to the electrode plate installed in the filter plate at 60 to 150V through a DC generator to form an electric field in the filter plate; It is characterized by providing an electric dehydration method for improving the sludge dewatering efficiency, including the step of dehydrating by pressing the filter plate to 2 ~ 5 bar by forming an electric field and operating the pressure cylinder at the same time.
이하에서는, 첨부도면을 참고하여 본 발명을 보다 상세하게 설명하기로 한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.
도 1 및 도 2는 본 발명에 따른 전기탈수방법을 설명하기 위한 예시적인 개념도이고, 도 3은 본 발명에 따른 전기탈수방법을 설명하기 위한 개략적인 장치 구성도이며, 도 4는 도 3의 여과판에 대한 상세도이고, 도 5는 본 발명에 따른 전기탈수시 전처리 약품에 대한 영향을 시험한 그래프이며, 도 6은 본 발명에 따른 전기탈수시 전기강도에 대한 영향을 시험한 그래프이고, 도 7은 본 발명에 따른 전기탈수시 전처리 탈수압력에 대한 영향을 시험한 그래프이다.1 and 2 is an exemplary conceptual diagram for explaining the electric dehydration method according to the invention, Figure 3 is a schematic configuration diagram for explaining the electric dehydration method according to the invention, Figure 4 is a filter plate of Figure 3 5 is a graph illustrating a test of the effect on the pretreatment drug during the electrical dehydration according to the present invention, FIG. Is a graph testing the effect on the pre-treatment dehydration pressure during electrical dehydration according to the present invention.
먼저, 본 발명에 따른 전기탈수방법의 기본원리를 설명하면 다음과 같다.First, the basic principle of the electric dehydration method according to the present invention will be described.
슬러지에 전기장을 걸어주면 슬러지에 포함된 입자성물질과 수분이 이동에 의하여 고액분리 되게 되는데 그것은 전기이동성과 전기삼투성으로 나타난다.When the electric field is applied to the sludge, the particulate matter and water contained in the sludge are separated into solid and liquid by movement, which is represented by electrophoretic and electroosmotic.
예컨대, 도 1에서와 같이, 전기이동성(Electrophoresis)은 직류전기장에서 전하를 띤 입자성 성분이 전극판 쪽으로 이동함을 의미하는 것으로, 대부분의 입자성물질(30)은 음전하를 띄게 되므로 이들이 전기적이동에 의해 양극판(10) 쪽으로 움직임이 일어나게 된다.For example, as shown in Figure 1, electrophoresis means that the charged particulate component in the direct current field moves toward the electrode plate, most of the
따라서, 압착에 의해 입자의 기공 혹은 모세관을 통해 수분을 강제적으로 탈수시키면서 동시에 전기장을 형성시키면 슬러지입자인 입자성물질(30)이 음극판(20)의 반대쪽으로 이동하게 되고 탈수시간이 경과됨에 따라 이 부분에 의한 탈수능 효율이 높아지게 된다.Therefore, when the water is forcibly dehydrated through the pores of the particles or the capillary by the compression, and at the same time to form an electric field, the
전기삼투성(Electro-osmosis)은 도 2의 예시와 같이, 전기장 내에서 수분의 이동성을 통칭하는 용어로서, 일단 압착에 의해 일정한 수분이 제거된 후 슬러지케이크(40)가 형성되고, 이 슬러지케이크(40) 내에 남겨진 수분은 슬러지입자층 내에서 반대 극성의 전극판(10,20) 쪽으로 각각 이동을 시작하게 되어 탈수가 촉진되게 되므로 탈수효율이 높아지게 된다.Electro-osmosis is a term that collectively refers to the mobility of water in an electric field, as illustrated in FIG. 2, and once a certain water is removed by pressing, a
그 외에 전기장에서 수분과 입자의 이동현상으로 인한 열 발생이 일어나는데 이를 쿨롱열(coulombic heating)이라 한다.In addition, heat generation occurs due to the movement of moisture and particles in the electric field, which is called coulombic heating.
결과적으로, 전기탈수방법은 모세관 압력과 전기삼투현상과 부수적으로 작용하는 전기이동성과 쿨롱열에 의해 입자와 액체의 고액분리가 이루어지며, 슬러지의 성분분석과 이온성 정도를 파악하여 적정 전기장을 형성시키고 전기장 인가시간을 최적화하면 전기탈수의 효율성을 극대화시킬 수 있게 된다.As a result, the electrodehydration method is a solid-liquid separation of particles and liquids by the electrophoretic and coulomb heat acting concomitantly with capillary pressure and electroosmotic phenomena. Optimizing the electric field application time can maximize the efficiency of electric dehydration.
본 발명은 이와 같은 원리를 이용한 것으로, 도 3과 같은 장치를 구성하고 도 4와 같은 여과판을 이용하여 효율적인 탈수가 일어나도록 한 것이다.The present invention is based on the same principle, it is to configure the device as shown in FIG. 3 and to use the filter plate as shown in FIG.
즉, 도 3에서와 같이, 탈수기지지대(100)가 마련되고, 그 내부에는 여과판이동대(110)가 배설되며, 상기 탈수기지지대(100)의 일측 외부에는 상기 여과판이동대(110)를 가압하는 가압실린더(120)가 설치되고, 상기 여과판이동대(110)에는 다수의 여과판(130)이 거치되며, 이들중 어느 하나에는 전선(150)을 통해 직류발생기(140)가 연결된다.That is, as shown in Figure 3, the
그리고, 상기 여과판(130)은 최외측에 지지대(132)가 마련되고, 그 내부에는 +,-전극판(134)이 교대로 설치되며, 상기 전극판(134)의 내측면에는 여과포(136)가 설치된다.In addition, the
이때, 상기 여과판(130)의 판 중심에는 슬러지를 공급시킬 수 있는 슬러지유입구(138)가 형성되고, 지지대(132) 및 전극판(134)에는 각각 공기 및 여과액이 이송되는 유통공(132a)과 전극판구멍(134a)이 형성된다.At this time, the
아울러, 본 발명 탈수방법은 슬러지를 전처리하여 극미세입자를 일정크기로 응집하고, 슬러지를 펌프를 이용해 여과판(130)으로 유입한 후 가압실린더(120)를 이용하여 일정비율로 압착하며, 이후 전극판(134)에 직류발생기(140)로부터 생성된 적정 직류전기장을 인가하여 고효율적으로 탈수시키는 과정을 통해 이루어진다.In addition, in the dehydration method of the present invention, after pretreatment of the sludge, the fine particles are agglomerated to a certain size, the sludge is introduced into the
나아가, 본 발명에서는 적정 약품 사용량을 결정하였는 바, 고효율인 점을 감안하여 슬러지 전처리시 사용되는 양이온 고분자 응집제를 50-100ppm 정도로 한정하였다. 이때 본원 발명에서 사용되는 양이온 고분자 응집제로서는 폴리아크로아마이드계 응집제를 들 수 있다.Furthermore, in the present invention, since the appropriate amount of chemicals was determined, the cationic polymer flocculant used in the sludge pretreatment was limited to about 50-100 ppm in consideration of high efficiency. At this time, as a cationic polymer flocculant used by this invention, a polychromamide flocculant is mentioned.
이는, 후술할 실험결과 상기의 범위 만으로도 기존보다 월등히 우수한 탈수효율을 얻을 수 있었기 때문이다.This is because the result of the experiment to be described later was able to obtain a much better dewatering efficiency than the existing range alone.
그리고, 하기한 식에 의하면 탈수효율은 전기장의 세기에 비례함을 알 수 있 다. And, according to the following equation it can be seen that the dehydration efficiency is proportional to the strength of the electric field.
V = U x EV = U x E
이때, V는 전기탈수에서 물의 이동속도, U는 전기탈수 유동성, E는 전기장의 세기이다.In this case, V is the moving speed of water in the electric dehydration, U is the electrical dehydration fluidity, E is the strength of the electric field.
따라서, 에너지 소비를 최소화하면서 탈수효율을 극대화할 수 있는 최적의 전기장 설정이 요구된다.Therefore, an optimal electric field setting that can maximize dehydration efficiency while minimizing energy consumption is required.
이하, 실시예를 통해 본 발명을 구체적으로 설명하기로 한다.Hereinafter, the present invention will be described in detail through examples.
[실시예 1]Example 1
철강슬러지에 대해 전기탈수에서 양이온 고분자 응집제 및 주입량이 탈수에 미치는 영향을 종래 방식과 비교 확인하기 위하여, 먼저 종래의 방식으로 철강슬러지에 양이온 고분자 응집제를 400ppm으로 투입한 후 그 각각을 필터프레스 탈수기로 10bar에서 60분(일반적인 탈수조건) 탈수하였다.In order to check the effect of the cationic polymer flocculant and injection amount on the dewatering of the steel sludge in comparison with the conventional method, 400 ppm of the cationic polymer flocculant was introduced into the steel sludge in the conventional manner, and then each of them was filtered through a filter press dehydrator. Dehydration was carried out at 10 bar for 60 minutes (general dehydration conditions).
그 결과, 탈수후 함수율이 45%였다.As a result, the water content was 45% after dehydration.
이와 대비하기 위해, 본 발명의 방식에서는 철강슬러지에 전처리를 위해 양이온 고분자 응집제를 0, 50, 100ppm으로 구분하여 사용하였고, 인가전기세기 100V, 탈수압력 3bar로 동일하게 유지하였으며, 그 탈수결과를 도 5에 그래프로 나타내었다.In contrast, in the method of the present invention, cationic polymer flocculant was used as 0, 50, and 100 ppm for pretreatment in steel sludge, and maintained at the same applied electric strength of 100 V and dehydration pressure of 3 bar. 5 is shown graphically.
도 5에서와 같이, 양이온 고분자 응집제의 주입량이 증가함에 따라 철강슬러지의 탈수효율이 향상되는 것을 알 수 있었다.As shown in Figure 5, it can be seen that as the injection amount of the cationic polymer flocculant increases, the dewatering efficiency of the steel sludge is improved.
즉, 함수율(기존 방식에서는 본 발명보다 훨씬 과량의 양이온 고분자 응집제인 400ppm 사용하였고 탈수후 함수율이 대략 45%였음)이 상당히 저감되는 것으로 나타났다.That is, the water content (400 ppm, which is a much larger amount of cationic polymer flocculant than in the present invention, was used and the water content was approximately 45% after dehydration) was significantly reduced.
[실시예 2]Example 2
철강슬러지에 대해 전기탈수에서 전기강도가 탈수에 미치는 영향을 종래 방식과 비교 확인하기 위하여, 먼저 종래의 방식으로 철강슬러지에 양이온 고분자 응집제를 400ppm으로 투입한 후 그 각각을 필터프레스 탈수기로 10bar에서 60분(일반적인 탈수조건) 탈수하였다.In order to check the effect of the electrical strength on the dewatering of the steel sludge in comparison with the conventional method, the cationic polymer flocculant was introduced into the steel sludge in the conventional method at 400ppm, and then each of them was subjected to 60 to 60 bar with a filter press dehydrator. Dehydrated in minutes (general dehydration conditions).
그 결과, 탈수후 함수율이 45%였다.As a result, the water content was 45% after dehydration.
이와 대비하기 위해, 본 발명의 방식에서는 양이온 고분자 응집제를 50ppm 투입하여 전처리하고, 탈수압력을 3bar, 인가전압에 따른 철강슬러지 탈수효과를 파악하기 위해 0, 10, 30, 60, 100, 150, 200V의 전압을 걸어주었다.In contrast, in the method of the present invention, 50 ppm of a cationic polymer flocculant is pretreated, and the dehydration pressure is 3 bar and 0, 10, 30, 60, 100, 150, 200 V to grasp the steel sludge dehydration effect according to the applied voltage. Applied voltage.
그 결과를 도 6에 나타내었는데, 실험결과 기존에 비해 함수율이 크게 저감되는 것을 확인하였다.The results are shown in Figure 6, the experimental results confirmed that the water content is significantly reduced compared to the existing.
[실시예 3]Example 3
철강슬러지에 대해 전기탈수에서 가압압력 변화가 탈수에 미치는 영향을 종래 방식과 비교 확인하기 위하여, 먼저 종래의 방식으로 철강슬러지에 양이온 고분자 응집제를 400ppm으로 투입한 후 그 각각을 필터프레스 탈수기로 10bar에서 60분(일반적인 탈수조건) 탈수하였다.In order to check the effect of the change of pressure pressure on the dewatering of steel sludge in comparison with the conventional method, first, the cationic polymer coagulant was introduced into the steel sludge in the conventional method at 400 ppm, and then each of them was filtered at 10 bar with a filter press dehydrator. Dehydration was carried out for 60 minutes (general dehydration conditions).
그 결과, 탈수후 함수율이 45%였다.As a result, the water content was 45% after dehydration.
이와 대비하기 위해, 본 발명의 방식에서는 양이온 고분자 응집제를 50ppm 투입하여 전처리하고, 인가전기의 세기를 100V, 압력을 1bar 에서 5bar 까지 증가시키면서 그에 따른 함수율 변화를 도 7에 나타내었는데, 실험결과 기존에 비해 함수율이 크게 저감되는 것을 확인하였다.In contrast, in the method of the present invention, 50 ppm of a cationic polymer flocculant is pretreated, and a change in moisture content is shown in FIG. 7 while increasing the applied electric strength to 100 V and increasing the pressure from 1 bar to 5 bar. It was confirmed that the water content is greatly reduced.
상술한 실시예들을 포함하여, 보다 고효율적으로 탈수하기 위해 양이온 고분자 응집제 투입후 기존 필터프레스나 혹은 벨트프레스를 이용하여 미리 탈수한 후 그 탈수된 슬러지케이크에 전기장을 인가하면서 다시한번 가압할 수도 있을 것으로 파악되었다.Including the above-described embodiments, in order to dewater more efficiently, the cationic polymer flocculant may be added and then dewatered in advance using an existing filter press or a belt press, and then pressurized again while applying an electric field to the dewatered sludge cake. It was understood that.
이상에서 상세히 설명한 바와 같이, 본 발명은 슬러지 전처리를 위한 약품을 줄일 수 있어 비용절감의 효과가 기대되고, 전기세기에 따라 탈수효율이 상승되므로 필요로 하는 탈수효율을 용이하게 조절할 수 있으며, 탈수효율이 높아 슬러지의 재활용율을 향상시키는 효과가 있다.As described in detail above, the present invention can reduce the drug for the sludge pretreatment is expected to reduce the cost, the dehydration efficiency is increased according to the electric strength can be easily adjusted, the dewatering efficiency required, dehydration efficiency This high effect has an effect of improving the recycling rate of the sludge.
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| KR100800528B1 (en) | 2006-07-04 | 2008-02-04 | 삼성석유화학(주) | Dehydrating apparatus unit and method of slurry |
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| JPS56158111A (en) | 1980-05-12 | 1981-12-05 | Ebara Infilco Co Ltd | Dehydrating method for slurry |
| KR970006504B1 (en) * | 1991-12-10 | 1997-04-28 | 산키 고오교오 가부시끼가이샤 | Sludge dehydration apparatus |
| KR200141913Y1 (en) | 1996-07-31 | 1999-06-01 | 김광희 | A pressing dehydrating apparatus by electric osmosis |
| KR200313454Y1 (en) | 2003-02-08 | 2003-05-14 | (주)동성기계 | Apparatus for dehydrating sludge with a type of electro-penetrative dehydration |
| KR20060023071A (en) * | 2004-09-08 | 2006-03-13 | 재단법인 포항산업과학연구원 | Electrical dehydrator convenient for supplying electricity |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS56158111A (en) | 1980-05-12 | 1981-12-05 | Ebara Infilco Co Ltd | Dehydrating method for slurry |
| KR970006504B1 (en) * | 1991-12-10 | 1997-04-28 | 산키 고오교오 가부시끼가이샤 | Sludge dehydration apparatus |
| KR200141913Y1 (en) | 1996-07-31 | 1999-06-01 | 김광희 | A pressing dehydrating apparatus by electric osmosis |
| KR200313454Y1 (en) | 2003-02-08 | 2003-05-14 | (주)동성기계 | Apparatus for dehydrating sludge with a type of electro-penetrative dehydration |
| KR20060023071A (en) * | 2004-09-08 | 2006-03-13 | 재단법인 포항산업과학연구원 | Electrical dehydrator convenient for supplying electricity |
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| KR100800528B1 (en) | 2006-07-04 | 2008-02-04 | 삼성석유화학(주) | Dehydrating apparatus unit and method of slurry |
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