KR20100110232A - Method for removing of nitrogen oxides - Google Patents
Method for removing of nitrogen oxides Download PDFInfo
- Publication number
- KR20100110232A KR20100110232A KR1020090028700A KR20090028700A KR20100110232A KR 20100110232 A KR20100110232 A KR 20100110232A KR 1020090028700 A KR1020090028700 A KR 1020090028700A KR 20090028700 A KR20090028700 A KR 20090028700A KR 20100110232 A KR20100110232 A KR 20100110232A
- Authority
- KR
- South Korea
- Prior art keywords
- gas
- nitrogen oxide
- mixing
- exhaust gas
- nitrogen oxides
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 230
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 78
- 239000006227 byproduct Substances 0.000 claims abstract description 17
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 238000009628 steelmaking Methods 0.000 claims abstract description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 11
- 239000001257 hydrogen Substances 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000571 coke Substances 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 9
- 239000000654 additive Substances 0.000 abstract description 7
- 230000000996 additive effect Effects 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 15
- 239000001301 oxygen Substances 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052815 sulfur oxide Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
본 발명은 700℃ 이하의 저온에서 첨가제를 주입하여 연소 시설에서 발생하는 질소산화물을 제거하는 저온 질소산화물 제거 방법에 관한 것으로, 본 발명에 따른 저온 질소산화물 제거 방법은 a) 제강 공정에서 발생하는 부생가스 및 배기가스 혼합하여 반응시키는 단계와; b) 상기 a) 단계에서 얻어진 가스에 환원제를 혼합하여 반응시키는 단계와; c) 상기 c) 단계에서 얻어진 가스를 통하여 질소산화물을 제거하는 단계;를 포함한다. The present invention relates to a low-temperature nitrogen oxide removal method for removing nitrogen oxides generated in a combustion facility by injecting an additive at a low temperature of 700 ℃ or less, the low-temperature nitrogen oxide removal method according to the present invention a) by-products generated in the steelmaking process Reacting by mixing the gas and the exhaust gas; b) reacting the gas obtained in step a) by mixing a reducing agent; c) removing nitrogen oxide through the gas obtained in step c).
Description
본 발명은 부생가스를 이용한 저온 질소산화물 제거 방법에 관한 것으로, 보다 상세하게는 700℃ 이하의 저온에서 첨가제를 주입하여 연소 시설에서 발생하는 질소산화물을 제거하는 저온 질소산화물 제거 방법에 관한 것이다. The present invention relates to a low temperature nitrogen oxide removal method using a by-product gas, and more particularly to a low temperature nitrogen oxide removal method for removing nitrogen oxides generated in the combustion facility by injecting an additive at a low temperature of 700 ℃ or less.
일반적으로 화석연료 연소나 쓰레기 소각과 같은 연소과정에서 발생되는 배기가스에는 황산화물(SOx), 질소산화물(NOx), HCl 등의 산성가스와 중금속이 포함되어 있다. In general, the exhaust gases generated during the combustion process such as fossil fuel combustion or waste incineration include acid gases such as sulfur oxides (SOx), nitrogen oxides (NOx), and HCl and heavy metals.
상기의 질소산화물은 대기오염의 주요 원인 중 하나로, 질소산화물은 산성비의 원인이 되며, 대도시에서 발생되는 휘발성 유기화합물과 반응하여 오존(O3)과 같은 2차 광화학 대기 오염 물질등을 생성하고, 성층권의 오존층을 파괴한다.Nitrogen oxide is one of the main causes of air pollution, nitrogen oxides cause acid rain, and reacts with volatile organic compounds generated in large cities to produce secondary photochemical air pollutants such as ozone (O 3 ), Destroy the stratospheric ozone layer.
한편, 질소산화물 중 95 % 이상이 반응성이 낮은 일산화질소(NO)이기 때문에 황산화물이나 HCl에 비하여 제거하기가 더욱 어렵다.On the other hand, since 95% or more of the nitrogen oxides are less reactive nitrogen monoxide (NO) it is more difficult to remove than sulfur oxides or HCl.
이러한 산업 공정에서 발생되는 질소산화물을 제거 및 저감하기 위해 다양한 방법들이 사용되고 있다. 가장 일반적으로 사용되고 있는 후처리 제거 방법은 선택적 촉매환원(selective catalytic reduction, SCR)과 SNCR((selective non-catalytic reduction)이다. Various methods are used to remove and reduce nitrogen oxides generated in such industrial processes. The most commonly used aftertreatment removal methods are selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR).
SCR은 SNCR에 비해 낮은 온도(200 - 400℃)에서 사용될 수 있으며 질소산화물 제거효율 또한 상대적으로 높다는 장점이 있는 반면에 초기 투자비가 높고, 촉매 독으로 인한 촉매 수명이 3 - 4년 정도의 주기로 교체를 해야 하며, SCR 촉매로 사용되는 물질들은 유독한 중금속이므로 특정폐기물로 처리해야 하는 단점이 이에 비해 SNCR은 질소산화물 제거효율이 낮고 운전 온도가 850 - 1150℃ 정도로 높다는 문제점이 있지만, 투자비가 저렴하며 기존 설비를 크게 보완하지 않고 설치해서 운영할 수 있다는 장점이 있어 많이 적용되고 있는 추세이다. SCR can be used at a lower temperature (200-400 ℃) compared to SNCR, and has a relatively high nitrogen oxide removal efficiency, while the initial investment is high and the catalyst life due to the catalyst poison is replaced every three to four years. The material used as SCR catalyst is toxic heavy metal, so it has to be treated as a specific waste. On the other hand, SNCR has low nitrogen oxide removal efficiency and high operating temperature of 850-1150 ℃. It is a trend that is being applied a lot because there is an advantage that can be installed and operated without significantly supplementing existing facilities.
또한, SNCR 공정은 일반적인 SNCR은 운전 온도 범위는 850 - 1150℃로 매우 고온에서 일어나는데, 이러한 온도 영역은 연소가 직접 일어나는 영역이므로 온도 분포가 균일하지 못하며 온도 변화가 매우 심하여 안정적인 NOx 제거효율을 얻기가 힘들다. In addition, the SNCR process takes place at a very high temperature, which is the operating temperature range of 850 to 1150 ° C. In this temperature range, since the combustion occurs directly, the temperature distribution is not uniform and the temperature change is very severe to obtain stable NOx removal efficiency. Hard.
이에 따라, SNCR의 단점인 높은 운전 온도와 좁은 반응 온도 문제를 극복하기 위한 기술이 개발되고 있다. NH3와 함께 H2, H2O2, 탄화수소 및 CO를 첨가제로 사용하여 운전 온도를 낮추는 기술이 보고 되었으나 700℃ 이하의 온도에 만족할 만한 제거효율을 얻지 못하였다. (NH2)2CO를 환원제로 사용하는 SNCR에서 위 목적 으로 Na가 포함된 화합물인 NaOH, Na2CO3, CH3O2Na과 알코올류의 화합물질을 첨가제로 넣기도 한다. Accordingly, techniques for overcoming the problems of high operating temperature and narrow reaction temperature, which are disadvantages of SNCR, have been developed. A technique for lowering the operating temperature by using H2, H2O2, hydrocarbons and CO as an additive with NH3 has been reported, but the removal efficiency was not obtained satisfactorily at a temperature below 700 ° C. In SNCR using (NH2) 2CO as a reducing agent, the compound of NaOH, Na2CO3, CH3O2Na and alcohols containing Na is added as an additive.
따라서, 본 발명의 목적은 상술한 종래기술에서 도출되는 문제를 해결하기 위한 것으로, 본 발명은 700℃ 이하의 저온에서 첨가제를 주입하여 연소 시설에서 발생하는 질소산화물을 제거하는 저온 질소산화물 제거 방법을 제공하는 데에 그 목적이 있다. Accordingly, an object of the present invention is to solve the problems derived from the above-described prior art, and the present invention provides a low temperature nitrogen oxide removal method for removing nitrogen oxides generated in a combustion facility by injecting an additive at a low temperature of 700 ℃ or less. The purpose is to provide.
또한, 본 발명의 다른 목적은 첨가제를 NH3와 같이 배기가스에 주입함으로써 SNCR 운전 온도를 낮추며 동시에 운전 온도 범위는 넓히는 방법을 제공하는 데에 있다. Another object of the present invention is to provide a method of lowering the SNCR operating temperature and widening the operating temperature range by injecting an additive into the exhaust gas such as NH3.
상기 목적을 달성하기 위하여 본 발명에 따른 저온 질소산화물 제거 방법은 Low temperature nitrogen oxide removal method according to the present invention to achieve the above object
a) 제강 공정에서 발생하는 부생가스 및 배기가스 혼합하여 반응시키는 단계와; a) mixing and reacting byproduct gas and exhaust gas generated in the steelmaking process;
b) 상기 a) 단계에서 얻어진 가스에 환원제를 혼합하여 반응시키는 단계와; b) reacting the gas obtained in step a) by mixing a reducing agent;
c) 상기 c) 단계에서 얻어진 가스를 통하여 질소산화물을 제거하는 단계;를 포함한다. c) removing nitrogen oxide through the gas obtained in step c).
상기 부생가스는 COG 및 FOG일 수 있으며, 상기 부생가스에 포함되는 수소는 배기가스 내 질소산화물의 2배 이상인 것이 바람직하다. The by-product gas may be COG and FOG, the hydrogen contained in the by-product gas is preferably at least two times the nitrogen oxide in the exhaust gas.
상기 환원제는 NH3인 것이 바람직하다. It is preferable that the said reducing agent is NH3.
상술한 바와 같은 본 발명은 700℃ 이하의 저온에서 첨가제를 주입하여 연소 시설에서 발생하는 질소산화물을 제거하는 저온 질소산화물 제거 방법을 제공할 수 있다. The present invention as described above may provide a low temperature nitrogen oxide removal method for removing the nitrogen oxide generated in the combustion facility by injecting an additive at a low temperature of 700 ℃ or less.
특히, 제철소 부생가스를 주입하는 경우 700℃ 이하의 온도에서도 SNCR 반응이 일어나므로 연소 후 배기 가스가 균일하게 혼합되어 있는 연소실 후단에 환원제를 주입하여 NO를 제거할 수 있어 적용하기가 비교적 용이하며, SNCR 운전온도 범위가 넓어져 NO 제거 효율을 극대화 할 수 있다. Particularly, when injecting iron by-product gas, SNCR reaction occurs even at a temperature of 700 ° C. or lower, so that NO can be removed by injecting a reducing agent into the rear end of the combustion chamber where the exhaust gas is uniformly mixed after combustion. The SNCR operating temperature range is widened to maximize the NO removal efficiency.
이하, 본 발명의 실시예에 대해 상세히 설명하기로 한다.Hereinafter, embodiments of the present invention will be described in detail.
본 명세서에서 사용된 '%'는 특별한 기재가 없는 한, 질량%를 의미한다. (본 발명에서 사용되고 있는 %가 질량 %인지, 중량 %인지, 부피%인지 명확하지 않습니다. 확인부탁드립니다.) As used herein, '%' means mass% unless otherwise specified. (It is not clear whether the% used in the present invention is mass%, weight%, volume%. Please confirm.)
본 발명의 저온 질소산화물 제거 방법은 The low temperature nitrogen oxide removal method of the present invention
a) 제강 공정에서 발생하는 부생가스 및 배기가스 혼합하여 반응시키는 단계 와; a) mixing and reacting byproduct gas and exhaust gas generated in the steelmaking process;
b) 상기 a) 단계에서 얻어진 가스에 환원제를 혼합하여 반응시키는 단계와; b) reacting the gas obtained in step a) by mixing a reducing agent;
c) 상기 c) 단계에서 얻어진 가스를 통하여 질소산화물을 제거하는 단계;를 포함한다. c) removing nitrogen oxide through the gas obtained in step c).
이하, 본 발명의 저온 질소산화물 제거 방법을 보다 상세히 설명한다. Hereinafter, the low temperature nitrogen oxide removal method of the present invention will be described in more detail.
a) 제강 공정에서 발생하는 부생가스 및 배기가스 혼합하여 반응시키는 단계와; a) mixing and reacting byproduct gas and exhaust gas generated in the steelmaking process;
우선, 배기 가스에 제강 공정에서 발생하는 부생가스를 혼합한다. 이때, 상기 부생가스로는 COG(Coke Oven Gas) 및 FOG (FOG의 풀네임을 기재하여 주시기 바랍니다.) 를 사용한다. First, by-product gas generated in the steelmaking process is mixed with the exhaust gas. In this case, COG (Coke Oven Gas) and FOG (please describe the full name of the FOG ) as the by-product gas.
상기 COG 가스는 보통 수소 50% 내외, 메탄 30% 내외, 일산화탄소 8% 내외, 중탄화수소 4% 내외, 질소 4% 내외,이산화탄소 3% 내외, 산소 1% 내외 및 기타 물질로 이루어진다. (COG의 조성이 발명자님께서 기재하여 주신 내용은 100%가 되지 않아 일반적인 조성을 기재하였습니다. 확인하여 주세요) The COG gas is usually composed of about 50% hydrogen, about 30% methane, about 8% carbon monoxide, about 4% bihydrocarbon, about 4% nitrogen, about 3% carbon dioxide, about 1% oxygen, and other materials. (The content of COG's composition is not 100%, so the general composition is described. Please check.)
또한, 상기 FOG 가스는 일산화탄소 45% 내외, 이산화탄소 35% 내외, 수소 20% 내외 및 기타 물질로 이루어진다. (FOG 가스의 일반적인 조성 비율을 COG와 같은 형태로 기재하여 주시기 바랍니다.) In addition, the FOG gas is composed of about 45% of carbon monoxide, about 35% of carbon dioxide, about 20% of hydrogen, and other materials. (Please describe the general composition of FOC gas in the same form as COG.)
이와 같이, COG 가스 및 FOG 가스는 H2(수소) 및 CO가 주된 성분을 이룬다. As such, the COG gas and the FOG gas consist mainly of H 2 (hydrogen) and CO.
상기 H2 및CO는 배기 가스 중에 포함되어 있는 산소와 반응하여 하기와 같은 반응을 일으킨다. The H 2 and CO react with the oxygen contained in the exhaust gas to produce the following reaction.
상기와 같이, 배기 가스에 COG 및 FOG 가스를 혼합하면, 반응식 1 내지 5의 반응에 의하여, OH, O 및 H가 생성된다. As described above, when COG and FOG gas are mixed with the exhaust gas, OH, O and H are generated by the reactions of Schemes 1-5.
b) 상기 a) 단계에서 얻어진 가스에 환원제를 혼합하여 반응시키는 단계 b) reacting the gas obtained in step a) by mixing a reducing agent;
상기 a) 단계에서 얻어진 가스에는 OH, O 및 H가 혼합되어 있으며, 이는 NH3로 이루어지는 환원제와 하기와 같은 반응을 일으킨다. The gas obtained in step a) is mixed with OH, O and H, which causes a reaction as described below with a reducing agent consisting of NH 3 .
상기와 같이 a) 단계에서 얻어진 가스에 환원제인 NH3는 반응식 6 내지 8과 같이 자신이 산화하여 NH2를 생성한다. As described above, NH 3, which is a reducing agent, in the gas obtained in step a) is oxidized as in Schemes 6 to 8 to generate NH 2 .
c) 상기 c) 단계에서 얻어진 가스를 통하여 질소산화물을 제거하는 단계c) removing nitrogen oxide through the gas obtained in step c).
상기 b) 단계에서 얻어진 NH2를 통하여 질소산화물이 제거된다. Nitrogen oxide is removed through NH 2 obtained in step b).
이를 반응식으로 표현하면 하기와 같다. This is expressed as a reaction scheme below.
즉, 질소산화물, 특히 제거가 어려운 일산화질소(NO)를 제거할 수 있다. That is, it is possible to remove nitrogen oxides, especially nitrogen monoxide (NO), which is difficult to remove.
위와 같이 부생가스에 포함된 CO와 HCO and H contained in by-product gas as above 22 는 산소가 존재하는 조건에서 반응하여 저온에서 NH2 라디칼 생성을 촉진하는 역할을 한다. 이러한 과정을 통해 생성된 NH2는 NOx와 반응하여 N2와 H2O로 된다.Reacts in the presence of oxygen to promote NH2 radical generation at low temperatures. NH2 produced through this process reacts with NOx to form N2 and H2O.
이하, 본 발명의 이해를 돕기 위하여 바람직한 실시예를 제시한다. 그러나 하기의 실시예는 본 발명을 보다 쉽게 이해하기 위하여 제공되는 것일 뿐, 실시예에 의해 본 발명의 내용이 한정되는 것은 아니다. Hereinafter, preferred embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are provided only for the purpose of easier understanding of the present invention, and the present invention is not limited by the examples.
(다른 물질은 ppm 단위이나, 산소만이 %로 농도를 표시하고 있습니다. 적절한 것인지 확인 부탁드립니다)(Other substances are in ppm, but only oxygen is indicated in%. Please make sure that it is appropriate.)
(실시예 1)(Example 1)
150 ppm NO가 포함된 배기가스와, 300 ppm의 NH3가스와, 상기 NO의 2배의 H2를 포함하는 COG 가스를 혼합하여 질소산화물을 제거한다. 이때, 산소의 농도는 10%이다. Nitrogen oxides are removed by mixing an exhaust gas containing 150 ppm NO, a 300 ppm NH 3 gas, and a COG gas containing H 2 twice the NO. At this time, the concentration of oxygen is 10%.
(실시예 2)(Example 2)
150 ppm NO가 포함된 배기가스와, 300 ppm의 NH3가스와, 상기 NO의 4배의 H2를 포함하는 COG 가스를 혼합하여 질소산화물을 제거한다. 이때, 산소의 농도는 10%이다. Nitrogen oxides are removed by mixing an exhaust gas containing 150 ppm NO, a 300 ppm NH 3 gas, and a COG gas containing H 2 times four times the NO. At this time, the concentration of oxygen is 10%.
(실시예 3)(Example 3)
150 ppm NO가 포함된 배기가스와, 상기 NO의 4배의 H2를 포함하는 COG 가스와, 상기 NO와 동일한 양의 NH3를 혼합하여 질소산화물을 제거한다. 이때, 산소의 농도는 10%이다. Nitrogen oxides are removed by mixing an exhaust gas containing 150 ppm NO, a COG gas containing H 2 four times the NO, and NH 3 in the same amount as the NO. At this time, the concentration of oxygen is 10%.
(실시예 4)(Example 4)
150 ppm NO가 포함된 배기가스와, 상기 NO의 4배의 H2를 포함하는 COG 가스와, 상기 NO의 2배의 NH3를 혼합하여 질소산화물을 제거한다. 이때, 산소의 농도는 10%이다. Nitrogen oxides are removed by mixing an exhaust gas containing 150 ppm NO, a COG gas containing four times H 2 of NO, and NH 3 twice of NO. At this time, the concentration of oxygen is 10%.
(실시예 5)(Example 5)
150 ppm NO가 포함된 배기가스와, 상기 NO의 4배의 H2를 포함하는 COG 가스와, 상기 NO의 4배의 NH3를 혼합하여 질소산화물을 제거한다. 이때, 산소의 농도는 10%이다. Nitrogen oxides are removed by mixing an exhaust gas containing 150 ppm NO, a COG gas containing H 2 four times the NO, and NH 3 four times the NO. At this time, the concentration of oxygen is 10%.
(실시예 6)(Example 6)
150 ppm NO가 포함된 배기가스와, 상기 NO의 4배의 H2를 포함하는 COG 가스와, 상기 NO의 8배의 NH3를 혼합하여 질소산화물을 제거한다. 이때, 산소의 농도는 10%이다. Nitrogen oxides are removed by mixing an exhaust gas containing 150 ppm NO, a COG gas containing four times H 2 of NO, and NH 3 eight times of NO. At this time, the concentration of oxygen is 10%.
(실시예 7)(Example 7)
150 ppm NO가 포함된 배기가스와, 상기 NO의 4배의 H2를 포함하는 COG 가스 와, 상기 NO의 2배의 NH3를 혼합하여 질소산화물을 제거한다. Nitrogen oxides are removed by mixing an exhaust gas containing 150 ppm NO, a COG gas containing H 2 four times the NO, and NH 3 twice the NO.
이때, 산소의 농도는 2%이다. At this time, the concentration of oxygen is 2%.
(실시예 8)(Example 8)
150 ppm NO가 포함된 배기가스와, 상기 NO의 4배의 H2를 포함하는 COG 가스와, 상기 NO의 2배의 NH3를 혼합하여 질소산화물을 제거한다. Nitrogen oxides are removed by mixing an exhaust gas containing 150 ppm NO, a COG gas containing four times H 2 of NO, and NH 3 twice of NO.
이때, 산소의 농도는 4%이다. At this time, the concentration of oxygen is 4%.
(실시예 9)(Example 9)
150 ppm NO가 포함된 배기가스와, 상기 NO의 4배의 H2를 포함하는 COG 가스와, 상기 NO의 2배의 NH3를 혼합하여 질소산화물을 제거한다. Nitrogen oxides are removed by mixing an exhaust gas containing 150 ppm NO, a COG gas containing four times H 2 of NO, and NH 3 twice of NO.
이때, 산소의 농도는 10%이다. At this time, the concentration of oxygen is 10%.
(비교예 1)(Comparative Example 1)
150 ppm NO가 포함된 배기가스, 300 ppm의 NH3가스, 상기 NO의 0배의 H2를 포함하는 COG 가스를 혼합하여 질소산화물을 제거한다. Nitrogen oxides are removed by mixing an exhaust gas containing 150 ppm NO, a 300 ppm NH 3 gas, and a COG gas containing 0 times H 2 of NO.
(비교예 2)(Comparative Example 2)
150 ppm NO가 포함된 배기가스, 300 ppm의 NH3가스, 상기 NO의 1배의 H2를 포함하는 COG 가스를 혼합하여 질소산화물을 제거한다. Nitrogen oxides are removed by mixing an exhaust gas containing 150 ppm NO, a 300 ppm NH 3 gas, and a COG gas containing H 2 times the NO.
상기의 실시예 1 및 2, 비교예 1 및 2의 결과를 도 1에 도시하였다. The results of Examples 1 and 2 and Comparative Examples 1 and 2 described above are shown in FIG. 1.
도 1을 참조하면, 질소산화물의 제거에 미치는 부생가스의 영향을 알 수 있다. Referring to Figure 1, it can be seen the effect of by-product gas on the removal of nitrogen oxides.
보다 상세하게는 부생가스가가 수소를 함유하는 경우에는 SNCR의 개시 온도가 하강함을 알 수 있다. 특히, 실시예 1에서와 같이 부생가스가 배기 가스의 질소산화물, 특히 NO의 농도의 2배 이상의 수소를 함유하는 경우, SNCR 개시 온도가 700℃ 이하임을 알 수 있다. More specifically, it can be seen that the start temperature of the SNCR falls when the by-product gas contains hydrogen. In particular, as in Example 1, it can be seen that when the by-product gas contains nitrogen oxide of the exhaust gas, especially hydrogen at least twice the concentration of NO, the SNCR start temperature is 700 ° C. or less.
또한, 상기 실시예 3 내지 실시예 6의 결과를 도 2에 도시하였다. In addition, the results of Examples 3 to 6 are shown in FIG.
도 2를 참조하면, 배기 가스 내의 질소산화물, 특히 NO와, COG 내의 H2를 고정시키고, NH3의 농도를 변화시킨 결과, NH3의 농도가 증가할수록 SNCR 개시온도가 낮아짐을 알 수 있다. Referring to Figure 2, secure the H 2 in the nitrogen oxides, particularly NO in the exhaust gas, COG and the result obtained by changing the concentration of NH 3, increasing the concentration of NH 3 can be seen that the SNCR start temperature becomes lower.
또한, 실시예 7 내지 실시예 9의 결과를 도 3에 도시하였다. In addition, the results of Examples 7 to 9 are shown in FIG.
도 3을 참조하면, 배기 가스 내의 질소산화물, 특히 NO와, COG 내의 H2와, NH3의 농도를 고정시키고, 산소의 농도를 변화시킨 결과, 산소의 농도가 증가할 수 록 SNCR 개시 온도가 큰 변화는 없으나, 약간 낮아짐을 알 수 있다. Referring to FIG. 3, the concentration of nitrogen oxides in the exhaust gas, in particular NO,
그러나, 별도의 측정을 한 결과, 산소 농도가 증가할수록 NO 농도가 덜 감소하는 것으로 나타났으나 산소 농도 10%이하에서는 약 35% NO 제거효율을 얻었다. However, as a result of a separate measurement, it was found that the NO concentration decreased less as the oxygen concentration increased, but at about 10% or less, the NO removal efficiency was obtained.
도 1은 실시예 1 및 2, 비교예 1 및 2의 결과를 도시한 도면. 1 shows the results of Examples 1 and 2 and Comparative Examples 1 and 2;
도 2는 실시예 3 내지 실시예 6의 결과를 도시한 도면. 2 shows the results of Examples 3 to 6. FIG.
도 3은 실시예 7 내지 실시예 9의 결과를 도시한 도면. 3 shows the results of Examples 7-9.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020090028700A KR101172125B1 (en) | 2009-04-02 | 2009-04-02 | Method for removing of nitrogen oxides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020090028700A KR101172125B1 (en) | 2009-04-02 | 2009-04-02 | Method for removing of nitrogen oxides |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20100110232A true KR20100110232A (en) | 2010-10-12 |
| KR101172125B1 KR101172125B1 (en) | 2012-08-10 |
Family
ID=43130957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020090028700A Expired - Fee Related KR101172125B1 (en) | 2009-04-02 | 2009-04-02 | Method for removing of nitrogen oxides |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR101172125B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949145A (en) * | 2014-04-23 | 2014-07-30 | 林小晓 | Method for removing nitrogen oxide in flue gas, and nano flue gas denitration system |
| CN104084015A (en) * | 2014-04-23 | 2014-10-08 | 林小晓 | Polluted air purifying system and work method thereof |
| CN112439317A (en) * | 2019-09-02 | 2021-03-05 | 大荣C&E(株) | Nitrogen oxide removal system using steel plant by-product gas as reducing agent |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10130010A (en) * | 1996-10-24 | 1998-05-19 | Nippon Sanso Kk | Method and apparatus for purifying carbon dioxide |
-
2009
- 2009-04-02 KR KR1020090028700A patent/KR101172125B1/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949145A (en) * | 2014-04-23 | 2014-07-30 | 林小晓 | Method for removing nitrogen oxide in flue gas, and nano flue gas denitration system |
| CN104084015A (en) * | 2014-04-23 | 2014-10-08 | 林小晓 | Polluted air purifying system and work method thereof |
| CN112439317A (en) * | 2019-09-02 | 2021-03-05 | 大荣C&E(株) | Nitrogen oxide removal system using steel plant by-product gas as reducing agent |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101172125B1 (en) | 2012-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103055694B (en) | A kind of method utilizing organic exhaust gas to carry out denitrating flue gas | |
| CN101970089B (en) | Method for removing N2O in exhaust gas | |
| CN101306308B (en) | A method for simultaneously treating mixed pollutant exhaust gas containing NOx and SO2 | |
| US8877150B1 (en) | Single-step process for the simultaneous removal of CO2, SOx and NOx from a gas mixture | |
| NO20044858L (en) | Method of Removal of Nitric Oxides | |
| JP2005528209A (en) | Method for reducing NOx in waste gas streams using chlorine dioxide | |
| US4853193A (en) | Process for removing NOx and SOx from a gaseous mixture | |
| KR101172125B1 (en) | Method for removing of nitrogen oxides | |
| KR101830477B1 (en) | Apparatus for removing of nitrogen oxides in exhaust sintering gas and method for removing of nitrogen oxides | |
| WO2013065850A1 (en) | Method for removing nitrogen oxides | |
| US20040213720A1 (en) | Method for treating flue gases containing ammonia | |
| CN107285282A (en) | Coal chemical industry sulfur-bearing, ammonia-contaminated gas handling process | |
| CN101591578B (en) | Process for extracting natural gas from coke-oven gas | |
| KR102474635B1 (en) | Exhaust gas treatment liquid for simultaneous reduction sulfur oxide and nitrogen oxide in exhaust gas, and exhaust gas treatment method using same | |
| KR100660234B1 (en) | Dry cleaning system and dry cleaning method of sintered exhaust | |
| KR101010727B1 (en) | Sulfur oxide removal system of combustion flue gas and method thereof | |
| US3923957A (en) | Conversion of hydrogen cyanide in foul gas streams to carbon disulfide | |
| KR101110553B1 (en) | How to remove hydrogen sulfide in coke oven gas | |
| JP2007327389A (en) | Exhaust gas treatment equipment | |
| JPH0661426B2 (en) | Method of removing sulfur dioxide from flue gas | |
| JP7529105B1 (en) | Method and device for supplying ammonia-mixed fuel | |
| KR20120074844A (en) | Method for removal of hydrogen sulfide by catalysts | |
| KR100580082B1 (en) | Method for removing of nitrogen oxides and heavy metals in flue gases | |
| KR20200054245A (en) | Method for performing selective catalytic reduction of coke oven flue gas | |
| CN111228980B (en) | A method for combined removal of phosphorus thiocyanate and nitrogen oxides in waste gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 20090402 |
|
| PA0201 | Request for examination | ||
| PG1501 | Laying open of application | ||
| E902 | Notification of reason for refusal | ||
| PE0902 | Notice of grounds for rejection |
Comment text: Notification of reason for refusal Patent event date: 20110118 Patent event code: PE09021S01D |
|
| E90F | Notification of reason for final refusal | ||
| PE0902 | Notice of grounds for rejection |
Comment text: Final Notice of Reason for Refusal Patent event date: 20111121 Patent event code: PE09021S02D |
|
| E701 | Decision to grant or registration of patent right | ||
| PE0701 | Decision of registration |
Patent event code: PE07011S01D Comment text: Decision to Grant Registration Patent event date: 20120604 |
|
| GRNT | Written decision to grant | ||
| PR0701 | Registration of establishment |
Comment text: Registration of Establishment Patent event date: 20120801 Patent event code: PR07011E01D |
|
| PR1002 | Payment of registration fee |
Payment date: 20120801 End annual number: 3 Start annual number: 1 |
|
| PG1601 | Publication of registration | ||
| FPAY | Annual fee payment |
Payment date: 20150723 Year of fee payment: 4 |
|
| PR1001 | Payment of annual fee |
Payment date: 20150723 Start annual number: 4 End annual number: 4 |
|
| FPAY | Annual fee payment |
Payment date: 20160801 Year of fee payment: 5 |
|
| PR1001 | Payment of annual fee |
Payment date: 20160801 Start annual number: 5 End annual number: 5 |
|
| FPAY | Annual fee payment |
Payment date: 20170802 Year of fee payment: 6 |
|
| PR1001 | Payment of annual fee |
Payment date: 20170802 Start annual number: 6 End annual number: 6 |
|
| FPAY | Annual fee payment |
Payment date: 20180802 Year of fee payment: 7 |
|
| PR1001 | Payment of annual fee |
Payment date: 20180802 Start annual number: 7 End annual number: 7 |
|
| FPAY | Annual fee payment |
Payment date: 20190801 Year of fee payment: 8 |
|
| PR1001 | Payment of annual fee |
Payment date: 20190801 Start annual number: 8 End annual number: 8 |
|
| PC1903 | Unpaid annual fee |
Termination category: Default of registration fee Termination date: 20220512 |