• Title, Summary, Keyword: De-SOx

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Development of the 120kW Class MPC Power Supply for DeNOx and DeSox System (120kW급 탈황탈질용 MPC전원장치 개발)

  • Kim, Soo-Hong;Kwon, Byung-Ki
    • Proceedings of the KIPE Conference
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    • pp.237-239
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    • 2009
  • This paper presents a new developed 160kV-120kW Class MPC (magnetic pulse compressor) power supply for DeNOx, DeSOx system. The circuit consists of N-series connected CCPS (capacitor charging power supply) and MPC Tank. The MPC power supply developed compared to the conventional LC resonant type has many advantage, it was verified reliability of a product by module, simulator and tank connection test. Now, the developed MPC power supply is installed POSCO sintering plant for DeSOx, DeNOx system.

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IMO 규정 대응 선박 배기가스 DePM, DeSOx 순환처리장치 (Recycle system) 개발

  • Ha, Sin-Yeong;Kim, In-Su
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • pp.64-65
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    • 2015
  • 본 연구는 PM과 SOx를 효과적으로 저감 시킬 수 있는 Water- Scrubber와 오염물과 세정수의 분리가 가능한 Purifier를 이용한 새로운 순환식 배기가스 세정시스템의 개발하여 PM, PAH 제거효율을 산정한 결과, PM과 PAH모두 유입 수 대비 99%이상 처리되는 것을 확인하였으며, 수질인자도 재사용이 가능한 유입수의 수준으로 분석되었다.

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Operational Characteristics of Pilot Scale Plasma DeSOx-DeNOx System for Treatment of Coal-Fired Flue Gas (석탄연소 배가스 처리용 플라즈마 탈황탈질 시스템의 운전 특성)

  • Jang, Gil-Hong;Paek, Min-Su;Kim, Tae-Hee;Jeong, Jong-Han
    • Proceedings of the KIEE Conference
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    • pp.1806-1808
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    • 1998
  • Tests of pilot-scale plasma DeSOx-DeNOx system using pulsed streamer corona were carried out. The system consists of the reactor with wire-plate electrodes the $30kW_{max}$. MPC type pulse generator, and $1MW_{th}$ pulverized coal combustor as a flue gas source. $NH_3$ and $C_2H_4$ were used to enhance the removal rate. The experimental result on the removal efficiency of SOx/NOx and on the effect of the additives was presented in this paper.

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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
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    • v.22 no.4
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    • pp.671-678
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    • 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.

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Influence of $1{\alpha}$, 25-dihydroxyvitamin $D_3$ [1, $25(OH)_2D_3$] on the expression of Sox 9 and the transient receptor potential vanilloid 5/6 ion channels in equine articular chondrocytes

  • Hdud, Ismail M.;Loughna, Paul T.
    • Journal of Animal Science and Technology
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    • v.56 no.8
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    • pp.33.1-33.8
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    • 2014
  • Background: Sox 9 is a major marker of chondrocyte differentiation. When chondrocytes are cultured in vitro they progressively de-differentiate and this is associated with a decline in Sox 9 expression. The active form of vitamin D, 1, 25 $(OH)_2D_3$ has been shown to be protective of cartilage in both humans and animals. In this study equine articular chondrocytes were grown in culture and the effects of 1, 25 $(OH)_2D_3$ upon Sox 9 expression examined. The expression of the transient receptor potential vanilloid (TRPV) ion channels 5 and 6 in equine chondrocytes in vitro, we have previously shown, is inversely correlated with de-differentiation. The expression of these channels in response to 1, 25 $(OH)_2D_3$ administration was therefore also examined. Results: The active form of vitamin D (1, 25 $(OH)_2D_3$ when administered to cultured equine chondrocytes at two different concentrations significantly increased the expression of Sox 9 at both. In contrast 1, 25 $(OH)_2D_3$ had no significant effect upon the expression of either TRPV 5 or 6 at either the protein or the mRNA level. Conclusions: The increased expression of Sox 9, in equine articular chondrocytes in vitro, in response to the active form of vitamin D suggests that this compound could be utilized to inhibit the progressive de-differentiation that is normally observed in these cells. It is also supportive of previous studies indicating that $1{\alpha}$, 25-dihydroxyvitamin $D_3$ can have a protective effect upon cartilage in animals in vivo. The previously observed correlation between the degree of differentiation and the expression levels of TRPV 5/6 had suggested that these ion channels may have a direct involvement in, or be modulated by, the differentiation process in vitro. The data in the present study do not support this.

Effect of Hydrothermal Treatment on Sulfur Dioxide Absorption Efficiency of Natural Brucite (천연 수활석의 이산화황 흡수성능에 대한 수열처리 효과)

  • Kim, Jin-Bae;Kang, Seong-Gu;Kim, Heon-Chang
    • Clean Technology
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    • v.16 no.4
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    • pp.254-257
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    • 2010
  • [ $Mg(OH)_2$ ]slurry was prepared by using natural mineral brucite exploited from Liaoning province in China, and its de-SOx efficiency was examined. The effect of difference in particle size distribution of brucite and activation by hydrothermal treatment were investigated. The de-$SO_2$ efficiency of a finely-milled brucite sample below 1000 mesh with narrow particle size distribution was higher than that of the sample below 80 mesh. On the other hand, the de-$SO_2$ efficiency of brucite sample below 80 meshes was significantly improved by the hydrothermal treatment at 363 K tor 3 h.

A study on topology of the DeNOx, DeSOx using magnetic pulse compressors (가포화 자기스위치를 이용한 탈황탈질 시스템의 전원장치에 관한 연구)

  • Kim, Soo-Hong;Lee, Young-Duck;Kim, Seung-Mo;Kim, Byung-Sub;Kwon, Byung-Ki;Choi, Chang-Ho
    • Proceedings of the KIPE Conference
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    • pp.157-159
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    • 2008
  • Generally, Capacitor charging power supply (CCPS) consist of the full-bridge inverter, LC resonant tank and capacitance load. The multi-connection systems are normally used for high voltage or high power application. In this paper, conventional parallel operation resonant type and proposed series operation PWM type CCPS for pulse corona occurrence of DeSOx, DeNOx system using magnetic pulse compressor make a comparison. The effect of proposed CCPS is verified by circuit characteristics analysis of parallel operation resonant type and series operation PWM type, and it is confirmed by simulation result.

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SO2 Removal by Internal Circulation of de-SOx Absorbents (흡수제 내부순환형 탈황장치의 SO2 제거성능 특성)

  • Park, Young-Ok;Park, Hyun-Jin;Kim, Yong-Ha
    • Journal of Korean Society for Atmospheric Environment
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    • v.27 no.6
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    • pp.672-680
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    • 2011
  • Three new granular absorbents were prepared from calcium hydroxide, and applied to an FGD process with internal circulation. The aim of the study was finding the most efficient of the these three applied absorbents for the $SO_2$ removal at high flue gas temperatures. The absorbent is fed to the testing unit at high operation temperature and fluidized inside the FGD system where the sorbent particles react with the $SO_2$ gas. The rate of $SO_2$ decomposition was high in C-type absorbent which had the large surface area. De-SOx characteristics of the current absorbents appeared to be similar to the other conventional agents in this fluidized bed combustor. In particular, the optimum de-SOx condition could be achieved at high mole ratios of Ca to S which can reduce the residual $SO_2$.

A Study on the Treatment Performance of Coalescer to Treat Exhaust Gas Cleaning Water (콜레이서를 이용한 배기가스 세정수 처리 성능에 관한 연구)

  • Ha, Shin-Young;Kim, In-Soo
    • Journal of Navigation and Port Research
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    • v.40 no.1
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    • pp.1-6
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    • 2016
  • This study was conducted on a circulation system which can recycle waste water from EGCS(Exhaust Gas Cleaning System) using a wet scrubber that is used to treat air pollutants from ships. Though we developed a water treatment system that could remove effectively particulate matters and dispersed oil included in cleaning water for Ship Exhaust Gas Recycle System(DePM & DeSOx), we found that it is difficult to treat minutely dispersed oil only by means of centrifugal-typed purifier. Therefore, to this system, we applied a coalescer that coalesces emulsified minute oil particles in the 2nd phase of dispersion state after being filtered through the centrifugal-typed purifier. After we treated cleaning water drained out of Ship Exhaust Gas Recycle System(DePM & DeSOx) by using both purifier and coalescer, we found that particulate matters and dispersed oil were removed more than 55% and 99%, respectively, in comparison with those contained in cleaning water influent. Putting the results together, we conclude that the treated cleaning water can be recycled as normal cleaning water if this cleaning water treatment system is employed by the wet cleaning tower system for the reduction of air pollutants from ships.