KR100506331B1 - Method of Stabilizing Treatment for Flying Ash in Incineration - Google Patents
Method of Stabilizing Treatment for Flying Ash in Incineration Download PDFInfo
- Publication number
- KR100506331B1 KR100506331B1 KR10-2003-0050598A KR20030050598A KR100506331B1 KR 100506331 B1 KR100506331 B1 KR 100506331B1 KR 20030050598 A KR20030050598 A KR 20030050598A KR 100506331 B1 KR100506331 B1 KR 100506331B1
- Authority
- KR
- South Korea
- Prior art keywords
- waste
- fly ash
- acid
- incineration
- incinerator
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000000087 stabilizing effect Effects 0.000 title claims description 9
- 239000002699 waste material Substances 0.000 claims abstract description 72
- 239000002253 acid Substances 0.000 claims abstract description 36
- 239000010881 fly ash Substances 0.000 claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 239000003513 alkali Substances 0.000 claims abstract description 17
- 239000010802 sludge Substances 0.000 claims abstract description 14
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 10
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 6
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 6
- 235000011116 calcium hydroxide Nutrition 0.000 claims abstract description 6
- 239000000428 dust Substances 0.000 claims abstract description 4
- 239000002912 waste gas Substances 0.000 claims abstract description 3
- 239000004571 lime Substances 0.000 claims description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 7
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 7
- 229910001385 heavy metal Inorganic materials 0.000 claims description 5
- 150000002500 ions Chemical class 0.000 claims description 5
- 229920001429 chelating resin Polymers 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- 238000004056 waste incineration Methods 0.000 abstract description 5
- 239000004568 cement Substances 0.000 description 11
- 238000006386 neutralization reaction Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 6
- 238000004064 recycling Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000011575 calcium Substances 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003254 anti-foaming effect Effects 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229960002089 ferrous chloride Drugs 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 1
- 235000014413 iron hydroxide Nutrition 0.000 description 1
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 1
- 238000010169 landfilling Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2200/00—Waste incineration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
-
- 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
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
-
- 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
- Y02W30/20—Waste processing or separation
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
본 발명은 폐기물 소각장에서 발생하는 소각 비산재를 폐산 및 폐알칼리를 이용하여 중화처리함으로써, 고가의 중화제를 사용할 필요 없이 경제적이고 환경 친화적인 소각 비산재의 처리 방법에 관한 것으로서, 폐기물 소각장의 반건식 또는 건식 반응탑에 슬러지 상태 또는 분말 상태의 소석회를 분사하여 폐기물 가스와 반응한 비산재를 집진하고, 이 비산재에 산업체에서 발생되는 폐산을 첨가하여 중화하면서, 상기 폐산을 중화하기 위하여 폐기물 소각장의 반응탑을 거쳐 백필터에서 집진되는 소석회 분진(폐알칼리)을 소량 가하여 중화하는 것으로 구성된다. The present invention relates to a method for treating incineration fly ash economically and environmentally friendly without the use of expensive neutralizers by neutralizing incineration fly ash generated in a waste incineration plant using waste acid and waste alkali, and semi-dry or dry reaction of the waste incineration plant. Sludge or powdered slaked lime is injected into the tower to collect fly ash reacted with the waste gas, and waste acid generated by the industry is added to the fly ash to neutralize the waste acid through the reaction tower of the waste incinerator. It consists of neutralizing by adding a small amount of hydrated lime dust (waste alkali) collected in the filter.
Description
본 발명은 폐기물 소각장에서 발생하는 소각 비산재의 안정화 처리 방법에 관한 것으로서, 좀 더 구체적으로는 폐기물 소각장에서 발생하는 소각 비산재를 폐산 및 폐알칼리를 이용하여 중화처리함으로써, 고가의 중화제를 사용할 필요 없이 경제적이고 환경 친화적인 소각 비산재의 처리 방법에 관한 것이다.The present invention relates to a method for stabilizing incineration fly ash generated in a waste incinerator, and more particularly, by neutralizing the incineration fly ash generated in a waste incinerator using waste acid and waste alkali, without using expensive neutralizing agents. And environmentally friendly methods of treating incineration fly ash.
종래 폐기물 소각장에서 발생되는 가스를 처리하기 위한 가장 일반적인 방법은, 반건식 또는 건식 반응탑에 슬러지 상태 또는 분말 상태의 소석회를 다량 분사하여 알칼리 상태인 폐기물 및 미반응 물질을 지정 폐기물로 분리하여 관리형 매립장에 매립하는 것이었다. Conventionally, the most common method for treating gas generated in a waste incinerator is spraying sludge or powdered slaked lime in a semi-dry or dry reaction column to separate alkaline waste and unreacted substances into designated wastes, and to manage the landfill site. Was to be reclaimed.
즉, 폐기물 소각장에서 발생되는 가스에 액상 소석회 또는 분말 소석회를 다량 분사하면, 아래의 화학반응식에 따라 염화칼슘, 황산칼슘, 불소화칼슘 및 탄산칼슘이 얻어지고, 또한 미반응 물질인 소석회와 암모니아 가스, 다이옥신, 퓨란, 불소가스, 황산화물, 질소산화물, 각종 중금속 이온들(구리, 납, 은 등)을 함유하는 비산재가 얻어지는데, 이 비산재는 5배 정도의 물로 희석했을 때 pH가 12 내지 14 정도로 강알칼리성이지만, 이를 중화하기 위한 산은 고가이어서 중화하지 못하고 매립장으로 보내어 매립하는 실정이었다. That is, when a large amount of liquid lime or powdered lime is injected into the gas generated from the waste incinerator, calcium chloride, calcium sulfate, calcium fluoride, and calcium carbonate are obtained according to the following chemical reaction formula, and unreacted lime, ammonia gas, and dioxin Fly ash containing furan, fluorine gas, sulfur oxides, nitrogen oxides, and various heavy metal ions (copper, lead, silver, etc.), which have a strong pH of about 12 to 14 when diluted with 5 times water. Alkaline, but the acid to neutralize it was expensive to be neutralized and sent to the landfill landfill situation.
SO2 + 1/2 O2 + Ca(OH)2 → CaSO4 + H2OSO 2 + 1/2 O 2 + Ca (OH) 2 → CaSO 4 + H 2 O
2HCl + Ca(OH)2 → CaCl2 + 2H2O2HCl + Ca (OH) 2 → CaCl 2 + 2H 2 O
2HF + Ca(OH)2 → CaF2 + 2H2O2HF + Ca (OH) 2 → CaF 2 + 2H 2 O
또한 다음의 부가적 반응도 일어난다.The following additional reactions also occur.
CO2 + Ca(OH)2 → CaCO3 + H2OCO 2 + Ca (OH) 2 → CaCO 3 + H 2 O
그러나 상기 비산재는 환경 친화적이지 못하여 폐기물 매립으로 인한 각종 사회 문제 및 환경 문제가 대두되었으며, 자원 재활용 및 환경 보호 측면에서 상기 비산재를 안정화시켜 매립하는 것이 필요하였다.However, the fly ash is not environmentally friendly, and various social and environmental problems due to landfilling have emerged, and it is necessary to stabilize and landfill the fly ash in terms of resource recycling and environmental protection.
이러한 폐알칼리 용액을 중화 처리하기 위한 종래의 기술로서, 국내 실용실안등록 제186069호(실용신안권자: 포항종합제철주식회사)는 "폐알칼리 용액의 중화처리 장치"를 개시하여, 탱크 내 상하측으로 설치된 두개의 교반기와 하측의 교반기를 통하여 소포재를 투입함으로써, 폐알칼리 용액의 중화처리가 보다 신속히 진행되고 제반 비용이 절감되어 경제적으로 중화 처리작업을 할 수 있도록 하는 중화처리 장치를 개시한 바 있다.As a conventional technique for neutralizing such waste alkali solution, Korean Utility Model Registration No. 186069 (Utility Model Holder: Pohang Iron & Steel Co., Ltd.) discloses a "neutralization solution of waste alkali solution" and installed in the tank up and down. Since the anti-foaming material is introduced through two stirrers and a lower stirrer, a neutralization treatment apparatus has been disclosed that allows neutralization of waste alkali solution to proceed more quickly and to reduce overall costs and to economically neutralize treatment.
그러나 상기 선행기술은 본 발명과 같이 폐기물 소각장에서의 폐알칼리를 처리하기 위한 것은 아니었으며, 상기 선행기술에 따라 폐알칼리 용액을 중화하기 위해서는 보조탱크, 다수의 날개, 숯팩 및 분사노즐을 구비한 특정의 기계가 필요하였다.However, the prior art was not intended to treat waste alkali in a waste incinerator as in the present invention. In order to neutralize the waste alkali solution according to the prior art, a specific tank having a secondary tank, a plurality of wings, a charcoal pack, and a spray nozzle was provided. Machine needed.
한편, 폐알칼리의 중화를 위해 사용될 수 있는 고가의 산의 대체물로서 산업체에서 발생되는 폐산을 이용하는 것을 고려할 수 있는데, 이러한 폐산을 이용한 종래의 기술로는, 국내 특허공개 제1992-11928호 "금속염을 함유한 폐산의 재생방법", 국내 특허공개 제2000-50632호 "폐산을 이용한 금속산화물 추출장치 및 그 방법", 국내 특허등록 제136159호 "폐산여과장치", 국내 특허공개 제1995-17742호 "폐산을 이용한 고순도 염화제일철 제조방법 및 이를 통한 자기기록매체용 수산화철 제조방법", 및 국내 특허등록 제128122호 "폐산을 이용한 고순도 염화제이철 수용액의 제조방법" 등이 있었다. On the other hand, it may be considered to use the waste acid generated in the industry as a substitute for the expensive acid that can be used for the neutralization of the waste alkali. As a conventional technique using such waste acid, Korean Patent Publication No. 1992-11928 "metal salt Recycling method of containing waste acid ", Korean Patent Publication No. 2000-50632" Metal oxide extraction device and method using waste acid ", Korean Patent Registration No. 136159" Waste Acid Filtration Device ", Domestic Patent Publication No. 1995-17742" High purity ferric chloride manufacturing method using waste acid and a method for producing iron hydroxide for magnetic recording medium ", and domestic patent registration No. 128122" manufacturing method of high purity ferric chloride solution using waste acid ".
그러나 이러한 선행기술들은 폐산을 재생하거나, 또는 폐산을 이용하여 염화제일철 및 염화제이철과 같은 물질을 얻기 위한 방법에 관한 것으로서, 폐기물 소각장에서 얻어지는 폐알칼리를 중화하기 위해 폐산을 이용하는 것은 아니었다. However, these prior arts relate to a method for regenerating waste acid or using waste acid to obtain materials such as ferrous chloride and ferric chloride, and not using waste acid to neutralize waste alkali from waste incinerators.
따라서, 본 발명은 폐기물 소각장에서 발생하는 소각 비산재의 처리 후 얻어지는 폐알칼리를 중화하기 위하여 고가의 중화용 산을 이용하는 대신, 산업체에서 발생되는 폐산, 즉 스테인레스강의 산처리 후 공정으로서 유효산을 회수한 잔여액 또는 표면 산세후의 폐액 등을 이용하여 중화시킴으로써, 소각 비산재의 안정화를 도모하는 매우 경제적인 처리 방법을 제공함을 목적으로 한다.Therefore, in the present invention, instead of using an expensive neutralizing acid to neutralize the waste alkali obtained after the incineration fly ash generated in the waste incinerator, the effective acid is recovered as a process after the acid treatment of waste acid generated in the industry, that is, stainless steel. It is an object to provide a very economical treatment method for stabilizing incineration fly ash by neutralizing with residual liquid or waste liquid after surface pickling.
본 발명의 또 다른 목적은 각종 공업 현장에서 얻어지는 폐알칼리 및 폐산을 중화제로 사용하여 폐기물 소각장의 비산재의 불완전한 이온 고리를 안정화시킴으로써 자원 재활용과 환경 보호 측면에서 유익한 소각 비산재의 안정화 처리방법을 제공하는 것이다.Still another object of the present invention is to provide a method for stabilizing incineration fly ash, which is beneficial in terms of resource recycling and environmental protection by stabilizing incomplete ion rings of fly ash in waste incinerators using waste alkali and waste acid obtained in various industrial sites as neutralizing agents. .
본 발명의 또 다른 목적은 중화 반응한 폐기물 비산재를 탈수기로 탈수하여 탈수된 슬러지를 시멘트 원료로서 사용하도록 하여 효율적인 자원 재활용 방법을 제공하는 것이다. Another object of the present invention is to provide an efficient resource recycling method by dewatering the waste fly ash neutralized by dehydration with a dehydrator to use the dewatered sludge as a cement raw material.
상기 목적을 달성하기 위한 본 발명의 소각 비산재의 안정화 처리 방법은, 폐기물 소각장의 반건식 또는 건식 반응탑에 슬러지 상태 또는 분말 상태의 소석회를 분사하여 폐기물 가스와 반응한 비산재를 집진하고, 이 비산재에 산업체에서 발생되는 폐산을 첨가하여 중화하면서, 상기 폐산을 중화하기 위하여 폐기물 소각장의 반응탑을 거쳐 백필터에서 집진되는 소석회 분진(폐알칼리)을 소량 가하여 중화하는 것으로 구성된다.The stabilization treatment method of incineration fly ash of the present invention for achieving the above object, by spraying the sludge or powdered lime in the semi-dry or dry reaction column of the waste incineration plant to collect the fly ash reacted with the waste gas, the industrial In order to neutralize the waste acid generated in the process, neutralize the waste acid by adding a small amount of slaked lime dust (waste alkali) collected in the bag filter through the reaction tower of the waste incinerator.
또한 본 발명의 방법에서, 폐기물 소각재의 중금속 이온을 제거하기 위하여 EDTA를 비롯한 폴리아미노카르복시산류, 시트르산, 폴리인산 등과 같은 킬레이트 수지를 첨가하여 반응시킬 수 있다.In addition, in the method of the present invention, in order to remove heavy metal ions of the waste incineration ash, a chelating resin such as polyaminocarboxylic acids such as EDTA, citric acid, polyphosphoric acid and the like may be added and reacted.
본 발명에서 사용하는 폐산은, 스테인레스강의 산처리 후 공정으로서 유효산을 회수한 잔여액 또는 표면 산세후의 폐액 등과 같이 각종 산업 현장에서 폐기물로서 얻어지는 것으로, 이러한 폐산은 지정 폐기물로서 적절히 처리되지 않는 한 환경에 악영향을 줄 수 있다. The waste acid used in the present invention is obtained as waste at various industrial sites, such as the residual liquid from which the effective acid has been recovered or the surface liquid after surface pickling as a process after the acid treatment of stainless steel. May adversely affect
따라서 폐산은 가송소다나 소석회 등 알칼리를 이용하여 폐기물 처리업체에 의하여 전문적으로 처리되어 왔는데, 이를 위해 고가의 비용이 소요되기 때문에, 폐알칼리의 중화 뿐 아니라 폐산의 효율적인 중화 처리는 당업계에서 오래 전부터 요구되어 왔던 사항이며, 본 발명에서는 산업체에서 얻어지는 폐산을 이용하여 강알칼리성의 폐기물 소각 비산재를 중화 처리하고 이러한 폐산의 중화를 위하여 소각장의 반응탑을 거쳐 백필터에서 집진되는 폐알칼리 소석회 분진을 이용하는 것이다.Therefore, waste acid has been professionally processed by waste treatment companies using alkalis such as soda and hydrated lime, which requires a high cost. Therefore, not only neutralization of waste alkali, but also efficient neutralization of waste acid has long been in the field. In the present invention, the waste acid obtained from the industry is used to neutralize the strong alkaline waste incineration fly ash and to use the waste alkaline slaked dust collected in the bag filter through the reaction tower of the incinerator for neutralization of the waste acid. .
본 발명에 따라 중화 처리한 후에는 처리액을 탈수기로 탈수하여 여액은 폐수 처리하고, 슬러지는 시멘트 공장으로 보내어 시멘트 소성로에서 소성하여 시멘트 원료로 사용하거나, 일반 폐기물로 매립할 수 있게 된다. 즉, 중화 처리한 후의 슬러지는 안정화된 슬러지 상태이므로 일반 폐기물로서 처리될 수 있는 것이다.After the neutralization treatment according to the present invention, the treatment liquid is dehydrated with a dehydrator, and the filtrate is treated with waste water, and the sludge is sent to a cement plant to be fired in a cement kiln to be used as a cement raw material or to be landfilled as a general waste. That is, the sludge after the neutralization treatment can be treated as a general waste because it is a stabilized sludge state.
이하 실시예를 통하여 본 발명을 보다 구체적으로 살펴보도록 하겠으며, 본 발명의 권리범위가 이러한 실시예에 한정되는 것은 아니다. Hereinafter, the present invention will be described in more detail with reference to the following examples, which are not intended to limit the scope of the present invention.
[실시예 1]Example 1
본 발명에 따른 소각 비산재의 안정화 처리 방법은 도 1에 도시된 바와 같이 진행된다.The stabilization treatment method of incineration fly ash according to the present invention proceeds as shown in FIG.
폐기물 소각장의 건식 반응탑에 분말 상태의 소석회를 분사하여 소각되어 나오는 가스와 반응시켜 비산재를 집진하였다.Powdered lime was injected into the dry reaction tower of the waste incinerator to react with the gas being incinerated to collect fly ash.
집진된 비산재를 0.5톤(ton) 백으로 4개의 백(총 2톤)을 저장 호퍼로 공급하여 스크류 컨베이어와 로터리 밸브를 거쳐 반응 탱크로 제공되도록 하였다. The collected fly ash was fed to the storage hopper with four bags (total 2 tons) in 0.5 ton bags to be provided to the reaction tank via a screw conveyor and a rotary valve.
반응 탱크에 비산재가 공급되면, 산업 현장에서 모아진 폐산을 8톤 공급하며, 중금속 용출을 막기 위해 킬레이트 수지 5kg 첨가되도록 하였다.When fly ash was supplied to the reaction tank, 8 tons of waste acid collected at the industrial site was supplied, and 5 kg of chelating resin was added to prevent heavy metal elution.
약 2시간 동안 중화반응을 시킨 뒤, 반응 탱크에 얻어진 생성물을 탈수기로 이동시켜 탈수하였다.After neutralization for about 2 hours, the product obtained in the reaction tank was dehydrated by moving to a dehydrator.
탈수한 여액 7톤 정도로 폐액 처리장치에서 폐수 처리하면 3톤의 슬러지가 얻어지는데, 얻어진 슬러지는 시멘트 공장으로 보내어 시멘트 소성로에서 소성하여 시멘트 원료로 사용하였다. 3 tons of sludge were obtained when wastewater was treated in a wastewater treatment apparatus at about 7 tons of dehydrated filtrate. The obtained sludge was sent to a cement plant and fired in a cement kiln to be used as a cement raw material.
[실시예 2]Example 2
폐기물 소각장의 반건식 반응탑에 슬러지 상태의 소석회를 분사하여 소각되어 나오는 가스와 반응시켜 비산재를 집진하였다. Sludge-lime lime was sprayed on the semi-dry reaction tower of the waste incinerator to react with the gas being incinerated to collect fly ash.
집진된 비산재를 0.5톤(ton) 백으로 4개의 백(총 2톤)을 저장 호퍼로 공급하여 스크류 컨베이어와 로터리 밸브를 거쳐 반응 탱크로 제공하였다. The collected fly ash was fed into the storage hopper with four bags (total 2 tons) as 0.5 tons bags and provided to the reaction tank via a screw conveyor and a rotary valve.
반응 탱크에 비산재가 공급되면, 산업 현장에서 모아진 폐산을 8톤 첨가하고, 중금속 용출을 막기 위해 킬레이트 수지도 5kg 첨가되도록 하였다.When fly ash was supplied to the reaction tank, 8 tonnes of spent acid collected from the industrial site was added, and 5 kg of chelating resin was added to prevent heavy metal elution.
약 2시간 동안 중화반응을 시킨 뒤, 반응 탱크에 얻어진 생성물을 탈수기로 이동시켜 탈수하였다.After neutralization for about 2 hours, the product obtained in the reaction tank was dehydrated by moving to a dehydrator.
탈수한 여액은 7톤 정도로 폐액 처리장치에서 폐수 처리하면 3톤의 슬러지가 얻어지는데, 얻어진 슬러지는 시멘트 공장으로 보내어 시멘트 소성로에서 소성하여 시멘트 원료로 사용하였고, 잉여 슬러지는 일반 폐기물로 매립하였다. The dehydrated filtrate is about 7 tons of wastewater treated in a wastewater treatment system to obtain 3 tons of sludge. The sludge obtained is sent to a cement factory, fired in a cement kiln, used as cement raw material, and the excess sludge is landfilled as general waste.
본 발명에 따르면, 폐기물 소각장에서 발생하는 소각 비산재의 처리 후 얻어지는 폐알칼리를 중화하기 위하여 고가의 중화용 산을 이용할 필요 없이, 산업체에서 발생되는 폐산을 이용함으로써, 매우 경제적인 소각 비산재의 안정화 처리 방법을 제공할 수 있게 된다.According to the present invention, a highly economical stabilization method of incineration fly ash is achieved by using waste acid generated in an industry without using expensive neutralizing acid to neutralize waste alkali obtained after treatment of incineration fly ash generated in a waste incinerator. It can be provided.
또한 본 발명은 산업 현장에서 얻어지는 폐알칼리 및 폐산을 중화제로 사용하여 폐기물 소각장의 비산재의 불완전한 이온 고리를 안정화시킴으로써 자원 재활용과 환경 보호 측면에서 유익한 소각 비산재의 안정화 처리방법을 제공한다.In addition, the present invention provides a method for stabilizing incineration fly ash, which is beneficial in terms of resource recycling and environmental protection by stabilizing incomplete ion rings of fly ash in waste incinerators using waste alkali and waste acid obtained as industrial neutralizers.
마지막으로 본 발명은 중화 반응한 폐기물 비산재를 탈수하여 얻어진 슬러지를 시멘트 원료로서 사용할 수 있도록 하여 효율적인 자원 재활용 방법을 제공한다.Finally, the present invention provides an efficient resource recycling method by allowing the sludge obtained by dehydrating the waste fly ash neutralized and reacted as a cement raw material.
도 1은 소각 비산재를 처리하기 위한 장치의 개략도 1 is a schematic diagram of an apparatus for treating incineration fly ash;
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| KR102082454B1 (en) | 2019-05-27 | 2020-02-27 | 윤수현 | Fly ash distribution device |
| KR102135845B1 (en) | 2020-01-21 | 2020-07-20 | 윤수현 | Fly ash distribution device |
| KR102166370B1 (en) | 2020-02-26 | 2020-10-15 | 금성엔비텍주식회사 | Fly ash stabilization method using chelate injection |
| KR102186054B1 (en) * | 2020-05-25 | 2020-12-07 | (주)에코이노베이션 | Recycling processing device for fly ashes containing heavy metals and method for treating same |
| KR20210090951A (en) | 2020-01-13 | 2021-07-21 | 주식회사 포스코건설 | Method for stabilizing heavy metals using byproducts of desulfurization |
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| KR100737891B1 (en) * | 2004-12-01 | 2007-07-10 | 유종열 | Method for Solidifying the Used Acid |
| KR101244825B1 (en) * | 2012-09-13 | 2013-03-18 | 신성종합건축사사무소(주) | High volume blast furnace slag concrete composition using waste ash and recycled aggregate |
| KR102493682B1 (en) * | 2019-02-18 | 2023-01-31 | 윤석환 | Treatment method of fly ash and use of the same |
| KR102302354B1 (en) * | 2021-03-10 | 2021-09-16 | 이충수 | Mixing Material Manufacturing System Using Waste Acid and Dissipative Materials |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102082454B1 (en) | 2019-05-27 | 2020-02-27 | 윤수현 | Fly ash distribution device |
| KR20210090951A (en) | 2020-01-13 | 2021-07-21 | 주식회사 포스코건설 | Method for stabilizing heavy metals using byproducts of desulfurization |
| KR102135845B1 (en) | 2020-01-21 | 2020-07-20 | 윤수현 | Fly ash distribution device |
| KR102166370B1 (en) | 2020-02-26 | 2020-10-15 | 금성엔비텍주식회사 | Fly ash stabilization method using chelate injection |
| KR102186054B1 (en) * | 2020-05-25 | 2020-12-07 | (주)에코이노베이션 | Recycling processing device for fly ashes containing heavy metals and method for treating same |
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