• Title, Summary, Keyword: 탈황, 탈질

Search Result 53, Processing Time 0.047 seconds

CFD Analysis on the Effect of the Nozzle Arrays and Spray Types in the Hydrogen Peroxide Mixing Quencher to Improve the Mixing Efficiency (과산화수소 혼합냉각기 내의 노즐배치 및 가스분사 방식 변화에 따른 혼합율 개선에 대한 전산해석적 연구)

  • Koo, Seongmo;Chang, Hyuksang
    • Clean Technology
    • /
    • v.23 no.1
    • /
    • pp.42-53
    • /
    • 2017
  • Numerical analysis was done to evaluate the fluid distribution inside of the mixing quencher to increase the reaction efficiency of the aqueous hydrogen peroxide solution in the scrubbing column which is used for simultaneous desulfurization and denitrification. Effective injection of the aqueous hydrogen peroxide ($H_2O_2$) solution in the mixing quencher has major effects for improving the reaction efficiency in the scrubbing column by enhancing the mixing of the aqueous $H_2O_2$ solution with the exhaust gas. The current study is to optimize the array of nozzles and the spray angles of the aqueous $H_2O_2$ solution in the mixing quencher by using the computational method. Main concerns of the analysis are how to enhance the uniformity of the $H_2O_2$ concentration distribution in the internal flow. Numerical analysis was done to check the distribution of the internal flow in the mixing quencher in terms of RMS values of the $H_2O_2$ concentration at the end of quencher. The concentration distribution of $H_2O_2$ at the end of is evaluated with respect to the different array of the nozzle pipes and the nozzle tip angles, and we also analyzed the turbulence formation and fluid mixing in the zone. The effect of the spray angle was evaluated with respect to the mixing efficiency in different flow directions. The optimized mixing quencher had the nozzle array at location of 0.3 m from the inlet duct surface and the spray angle is $15^{\circ}$ with the co-current flow. The RMS value of the $H_2O_2$ concentration at the end of the mixing quencher was 12.4%.

Reaction Characteristics of SOx/NOx Removal Using CuO/γ-Al2O3 Sorbent/Catalyst (CuO/γ-Al2O3 흡수제/촉매를 이용한 SOx/NOx 제거 반응특성)

  • Yoo, Kyung Seun;Kim, Sang Done
    • Journal of Korean Society of Environmental Engineers
    • /
    • v.22 no.4
    • /
    • pp.671-678
    • /
    • 2000
  • Reaction characteristics of simultaneous removal of SOx and NOx have been investigated in a thermogravimetric analyzer and tubular fixed bed reactor using the $CuO/{\gamma}-Al_2O_3$ sorbent/catalyst. Sulfur removal capacity of $CuO/{\gamma}-Al_2O_3$ sorbent/catalyst is largely enhanced above both the temperature of $450^{\circ}C$ and the loading of 6wt% due to the participation of alumina support in a sulfation reaction. The NO reduction efficiency of 8wt% $CuO/{\gamma}-Al_2O_3$ sorbent/catalyst shows the maximum value at $370^{\circ}C$ and then decreases with the increase of reaction temperature due to the oxidation of $NH_3$ gas. The presence of sulfate on the surface of sorbent/catalyst enhances the optimum reaction temperature showing the maximum deNOx efficiency. In the simultaneous removal of SOx and NOx at $250^{\circ}C$. deNOx activity of $CuO/{\gamma}-Al_2O_3$ sorbent/catalyst is rapidly decreased due to the formation of ammonium salts such as $NH_4HSO_4$. In the simultaneous removal reaction of SOx and NOx, the optimum temperature showing the maximum deNOx efficiency increases to $400^{\circ}C$ due to the presence of $SO_2$ gas.

  • PDF

Preparation of the Inexpensive Fiberglass-Reinforced Activated Carbon Assemblies, and Development of Dry De-NOXSO System as Its Application (저렴한 유리강화 활성탄소섬유를 이용한 건식 동시 탈황 탈질 시스템의 개발)

  • Jeong, Ae-Young;Lee, Si-Hyun;Kim, Dong-Pyo
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.1065-1068
    • /
    • 1998
  • On the study, The activated carbon assemblies(ACA) were prepared by activation of the coated glass mate(woven type) with phenolic resin at $700^{\circ}C$ under $N_2$ after drying and curing processes. Surface of the ACA was continuously modified with $N_2$, $CO_2$ or $NH_3$ at $700^{\circ}C$ for 2 hour for comparison of adsorptive characteristics between the ACA and commercial activated carbon cloth. The ACA showed high surface areas up to $2440\;m^2/g$ when converted into the coated carbon base, and the surface was investigated by FT-IR and XPS. The basic ACA modified with $NH_3$ displayed the efficient removal capability of $SO_2$, which is 75% of that in commercial activated carbon cloth. Therefore, it has proved the applicability of ACA as an inexpensive materials for Dry de-SOX system.

  • PDF

Preparation of the Inexpensive Fiberglass-Reinforced Activated Carbon Assemblies, and Development of Dry De-NOXSO System as Its Application (저렴한 유리강화 활성탄소섬유를 이용한 건식 동시 탈황 탈질 시스템의 개발)

  • Jeong, Ae-Young;Lee, Si-Hyun;Kim, Dong-Pyo
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.717-720
    • /
    • 1998
  • On the study, The activated carbon assemblies(ACA) were prepared by activation of the coated glass mat(woven type) with phenolic resin at $700^{\circ}C$ under $N_2$ after drying and curing processes. Surface of the ACA was continuously modified with $N_2$, $CO_2$ or $NH_3$ at $700^{\circ}C$ for 2 hour for comparison of adsorptive characteristics between the ACA and commercial activated carbon cloth. The ACA showed high surface areas up to $2440\;m^2/g$ when converted into the coated carbon base, and the surface was investigated by FT-IR and XPS. The basic ACA modified with $NH_3$ displayed the efficient removal capability of $SO_2$, which is 75% of that in commercial activated carbon cloth. Therefore, it has proved the applicability of ACA as an inexpensive materials for Dry de-SOX system.

  • PDF

Preparation of the Inexpensive Fiberglass-Reinforced Activated Carbon Assemblies, and Development of Dry De-NOXSO System as Its Application (저렴한 유리강화 활성탄소섬유를 이용한 건식 동시 탈황 탈질 시스템의 개발)

  • Jeong, Ae-Young;Lee, Si-Hyun;Kim, Dong-Pyo
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.397-400
    • /
    • 1998
  • On the study, The activated carbon assemblies(ACA) were prepared by activation of the coated glass mat(woven type) with phenolic resin at $700^{\circ}C$ under $N_2$ after drying and curing processes. Surface of the ACA was continuously modified with $N_2$, $CO_2$ or $NH_3$ at $700^{\circ}C$ for 2 hour for comparison of adsorptive characteristics between the ACA and commercial activated carbon cloth. The ACA showed high surface areas up to $2440\;m^2$/g when converted into the coated carbon base, and the surface was investigated by FT-IR and XPS. The basic ACA modified with $NH_3$ displayed the efficient removal capability of $SO_2$, which is 75% of that in commercial activated carbon cloth. Therefore, it has proved the applicability of ACA as an inexpensive materials for Dry de-SOX system.

  • PDF

Technical Development of Flue Gas Control at Commercial Plant Using the Non-thermal Plasma Process (저온 플라즈마 공정을 이용한 상용설비의 배연가스 처리 기술개발)

  • Yoo, J.S.;Paek, M.S.;Kim, T.H.;Kim, J.I.;Kim, Y.S.;Choi, S.H.
    • Proceedings of the KSME Conference
    • /
    • /
    • pp.939-944
    • /
    • 2001
  • For the application of simultaneous $DeSO_{2}\;&\;DeNO_{x}$ equipment using non-thermal plasma process to the industrial and power plants, the many types of plasma device and process were studied. The e-beam and pulsed plasma corona discharge process are outstanding for the study to apply commercial large-scale plant from among these. In this paper, non-thermal plasma of technical trends and the characteristics of system developed by Doosan heavy industries & construction Co., Ltd. are explained. We have researched pulsed plasma corona discharge process since 1994. At the basis of reasonable results for the pilot plant, we constructed the demonstration plant at a domestic coal-fired power plant in 1999, as the previous step for commercial use. In near future, enough information about designs and costs of commercial-size system will be obtained.

  • PDF

A Study on The Reaction Characteristics of Desulfurization and Denitrification in Non-Thermal Plasma Conditions (저온 플라즈마 조건에서 탈황.탈질 반응 특성 연구)

  • 신대현;우제경;김상국;백현창;박영성;조정국
    • Journal of Energy Engineering
    • /
    • v.8 no.1
    • /
    • pp.150-158
    • /
    • 1999
  • 본 연구는 저온플라즈마를 이용하여 배기가스중의 SOx와 NOx를 동시에 처리하는 공정을 개발하는 것으로서, 최적의 반응제 선정과 효율적인 공정의 구성을 위해 SOx, NOx와 반응제와 반응기구를 밝히고자 하였다. 실험은 1.0 N㎥/h의 모사가스를 이용한 기초실험과 20 N㎥/h의 실제 연소가스를 이용한 실험으로 진행되었으며, 반응제로는 NH3와 파리핀계 및 올레핀계 탄화수소를 사용하였다. NH3를 반응제로 한 SO2 제거반응은 비플라즈마 조건에서는 NH4HSO3, 플라즈마 조건에서는 (NH4)2SO4의 생성반응이었고, 두 조건 모두 높은 제거율을 나타냈다. 반응제를 사용하지 않은 플라즈마 조건에서 SO2는 환원반응이 일어나고 O2 농도의 증가는 역반응을 증가시키는 화학평형에 의해 SO2의 제거율이 감소되었다. 플라즈마 조건에서 NO는 O2농도가 낮은 경우는 NO의 환원반응이 주로 일어나고, O2 농도가 높을 경우는 산화반응이 지배적이었다. 올레핀계 탄화수소는 플라즈마 조건에서 NO 산화 반응에 탁월한 효과를 보였을 뿐만 아니라 SO2 제거에도 효과를 보여 최대 40%의 제거율을 나타냈으며, NH3의 사용을 줄일 수 있음을 확인하였다.

  • PDF

A Patent Analysis on Impurity Removal and Catalysts for Crude Oil Purification (원유 불순물 제거 및 정제 관련 촉매 기술에 대한 특허 분석)

  • Jo, Hee-Jin;Moun, Seong-Guen;Jo, Young-Min;Chung, Yon-Soo
    • Clean Technology
    • /
    • v.16 no.1
    • /
    • pp.1-11
    • /
    • 2010
  • As crude oil with heavier and/or highly oxidized components prevails, purification technologies such as desulfurization, denitrilization and demetalization have become important issues to control contents of sulfur and other impurities affecting the quality of petroleum. Also, the importance of catalyst technologies related with crude oil purification has been emphasized to control the production and yield of products. In this paper, technology trends of impurity removal such as sulfur, nitrogen and metal components from crude oil and catalysts related with purification of crude oil were studied through patent analysis. The patents published or registered in Korea, U. S. A., Japan, and Europe from mid 1970's to 2009 had been analyzed based on the application tendency, the distribution of major applicants, and their active indices, etc. The technology flow was figured out to see the technology trends.

Efficient Desulfurization and Denitrification by Low Temperature Plasma Process (저온 플라즈마 공정에 의한 효율적인 탈황 및 탈질)

  • Kim, Sung-Min;Kim, Dong-Joo;Kim, Kyo-Seon
    • Korean Chemical Engineering Research
    • /
    • v.43 no.1
    • /
    • pp.129-135
    • /
    • 2005
  • In this study, we have analyzed the removal efficiencies of $SO_2$ and $SO_2/NO$ by the pulsed corona discharge process and investigated the effects of several process variables on those removal efficiencies systematically. The effects of process variables such as applied voltage, pulse frequency, residence time, and initial concentrations of reactants (NO, $SO_2$, $NH_3$, $H_2O$, and $O_2$) on the removal efficiency were analyzed. As the applied voltage, the pulse frequency or the residence time increases or as the $O_2$ or the $H_2O$ or the $NH_3$ concentration in the inlet feed gas stream increases, the $SO_2$ removal efficiencies and the simultaneous removal efficiencies of $SO_2/NO$ also increase. These experimental results can be used as a basis to design the pulsed corona discharge process to remove $NO_x$ and $SO_x$.

Effect of an Additives on Simultaneous Removal of NOx, $So_2$by Corona Discharge (코로나 방전에 의한 NOx, $So_2$동시제거에서 첨가제의 영향)

  • 박재윤;고용술;이재동;손성도;박상현
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.13 no.5
    • /
    • pp.451-457
    • /
    • 2000
  • Experimental investigations on the effect of two kinds of additives ; aqueous NaOH solution and ammonia(NH$_3$) for removal of NOx and SO$_2$ simultaneously by corona discharge were carried out. The simulated combustion flue gas was[NO(0.02[%])-SO$_2$(0.08[%])-$CO_2$-Air-$N_2$] Volume percentage of aqueous NaOH solution used was 20[%] and $N_2$flow rate was 2.5[$\ell$/min] for bubbling aqueous NaOH solution Ammonia gas(14.81[%]) balanced by argon was diluted by air. NH$_3$ molecular ratios(MR) based on [NH$_3$] and [NO+SO$_2$] were 1, 1.5 and 2.5 The vapour of aqueous NaOH solution and NH$_3$was introduced to the main simulated combustion flue gas duct through injection systems which were located at downstream of corona discharge reactor. NOx(NO+NO$_2$) removal rate by injecting the vapour of aqueous NaOH solution was much better than that by injecting NH$_3$however SO$_2$removal rate by injecting NH$_3$was much better than that by injecting the vapour of aqueous NaOH SO$_2$removal rate slightly increased with increasing applied voltage. When the vapour of aqueous NaOH solution and NH$_3$were simultaneously injection NOx and SO$_2$ removal rate were significantly increased.

  • PDF