• Title/Summary/Keyword: Steam boiler

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A Study on the Implementation of PLC Program for Flowing Type Steam Boiler Control (관류형 스팀보일러 제어를 위한 PLC PROGRAM 구현에 관한 연구)

  • Cho, Hyeon-Seob;Kim, Jong-Ok;Kim, Hee-Suk
    • Proceedings of the KIEE Conference
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    • 2001.07d
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    • pp.2439-2441
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    • 2001
  • In this paper, PLC program for flowing type steam boiler control is presented. The function of the implementation are flowing type steam boiler, PLC control, interpretation of PLC command, and temperature scheme. The flowing type steam boiler approach is based on master-slave control concept. To show validity of the developed PLC program, severial experiments are illustrated.

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A Study on the Apparatus for Monitoring and Diagnosing the Real-Time Operating Performance of Steam Boiler Control (대열 스팀보일러의 실시간 운전성능 감시 및 진단 장치에 관한 연구)

  • Cho, Hyun-Seob;Oh, Myoung-Kwan
    • Proceedings of the KAIS Fall Conference
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    • 2010.05a
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    • pp.135-137
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    • 2010
  • In this paper, PLC program for flowing type steam boiler control is presented. The function of the implementation are flowing type steam boiler, PLC control, interpretation of PLC command, and temperature scheme. The flowing type steam boiler approach is based on master-slave control concept. To show validity of the developed PLC program, severial experiments are illustrated.

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Study on the Development of Steam Boiler using Carbon-fiber Heater (탄소섬유 발열체를 이용한 증기 보일러 개발에 관한 연구)

  • Kim, Bu-Ahn;Kang, Suk-Jun;Choi, Young-Min;Moon, Chang-Kown
    • Journal of Power System Engineering
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    • v.21 no.3
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    • pp.30-36
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    • 2017
  • Carbon fiber shows excellent heat generation value and thermal efficiency comparing with the metallic materials because of its far infrared-rays and radiant heat. So, high performance and economic steam boiler system for the industry can be manufactured by using the carbon fiber heater. The far infrared ray radiation rate was more than 90 % of carbon fiber. Steam boiler system with carbon fiber heater in this study is made up of heating section. In the proof test of steam boiler, the aimed temperature and dwelling time were at $500^{\circ}C$ for 8,000 hours, $600^{\circ}C$-3,000 hours, and $700^{\circ}C$-1,000 hours. The temperature rise rate of steam boiler with carbon fiber heater was about 40% faster than that of the conventional boiler.

A study on the steam boiler with high compression waste heat recovery system (고압축 폐열회수장치를 구비한 증기보일러에 관한 연구)

  • HAN, Kyu-il;CHO, Dong-Hyun
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.53 no.3
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    • pp.302-307
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    • 2017
  • An electric steam boiler equipped with a condensate recovery system, which stores the condensate generated after using steam in steam washers, steam cookers, steam irons, and steam cleaners in a condensate tank and supplies compressed air to the condensate tank so that the condensate is recovered to the boiler by the pressure of the compressed air, was studied. In the results of this study, the heat energy balance between the quantity of the heat generated by the non-metallic surface heating element and the quantity of the heat absorbed by the water was good in a range of ${\pm}5%$. In addition, the heat transfer rate increased in proportion to the electric power of the surface heating element heater, the waste heat energy was normally recovered by the recovery of the condensate of the steam boiler equipped with the high compression waste heat recovery system, and the recovery rate of the waste heat exhibited 23%.

Temperature control for once through boiler (관류형 보일러의 온도제어)

  • 김은기
    • 제어로봇시스템학회:학술대회논문집
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    • 1991.10a
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    • pp.900-904
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    • 1991
  • It is important and difficult to control the steam temperature in the once through boiler. Generally, steam temperature of once through boiler not only is controlled by boiler spray water flow, but also is influenced by feed water flow and fuel flow. So we have to make the same gain of fuel flow controller and feed water flow controller. This paper is shown the design and test of steam temperature and feed water flow control system for once through boiler in pusan thermal power plant.

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Adaptive predictive level control of waste heat steam boiler based on bilinear model (쌍일차 모델을 이용한 폐열 스팀 보일러의 액위 적응 예측 제어)

  • Oh, Sea-Cheon;Yeo, Yeong-Koo
    • Journal of Institute of Control, Robotics and Systems
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    • v.2 no.4
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    • pp.344-350
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    • 1996
  • An adaptive predictive level control of waste heat steam boiler was studied by using mathematical models considering the inverse response. The simulation experiments of the model identification were performed by using linear and bilinear models. From the results of simulations it was found that the bilinear model represented the actual dynamic behavior of steam boiler very well. ARMA model was used in the model identification and the adaptive predictive controller. To verify the performance and effectiveness of the adaptive predictive controller used in this study the simulation results of the adaptive predictive level control for waste heat steam boiler based on bilinear model were compared to those of P, PI and PID controller. The results of simulations showed that the adaptive predictive controller provides the fast arrival to setpoint of liquid level.

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Modelling and Verification of Once-Through Subcritical Heat Recovery Steam Generator (관류형 아임계압 배열회수보일러의 열성능 모델링과 검증)

  • Lee, Chae-Soo;Choi, Young-Jun;Kim, Hyun-Gee;Yang, Ok-Chul;Chong, Chae-Hon
    • Proceedings of the KSME Conference
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    • 2004.11a
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    • pp.1692-1697
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    • 2004
  • The once-through heat recovery steam generator is ideally matched to very high temperature and pressure, well into the supercritical range. Moreover this type of boiler is structurally simpler than drum type boiler. In drum type boiler, each tube play a well-defined role: water preheating, vaporization, superheating. Empirical equations are available to predict the average heat transfer coefficient for each regime. For once-through heat recovery steam generator, this is no more the case and mathematical models have to be adapted to account for the disappearance of drum type economizer, boiler, superheater. General equations have to be used for each tube of boiler, and actual heat transfer condition in each tube has to be identified.

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A Study on Dynamic Matrix Control to Boiler Steam Temperature (관류보일러 스팀 온도의 동역학 행렬 제어에 관한 연구)

  • Kim, Woo-Hun;Moon, Un-Chul
    • Proceedings of the IEEK Conference
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    • 2009.05a
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    • pp.323-325
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    • 2009
  • In this paper, we present simulation results of Dynamic Matrix Control(DMC) to a boiler steam temperature. In order to control of steam temperature, we choose the input-output variables and generate the step response model by each input variable's step test. After that, the control structure executes on-line control with optimization using step response model. Proposed controller is applied to the APESS(Doosan company's boiler model simulator) and it is observed that the simulation results show satisfactory performance of proposed control.

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Temperature Control of Superheater Steam in Thermal Power Plant (화력발전소의 과열기증기의 온도제어)

  • Shin, Hwi-Beom;Lee, Soon-Young
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.11
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    • pp.2006-2011
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    • 2010
  • The superheater in the thermal power plant makes the wet steam into the dry steam with high temperature and high pressure by using the boiler heat. The dry steam pressure rotates the turbine-generator system. The efficiency and life time of the boiler heavily depends on the steam temperature regulation. The steam temperature can be deviated from the reference by the MW demand of the power plant. It is therefore required that the PI(proportional-integral) controller should be robust against the disturbance such as the MW demand. In this paper, the PI controller with the integral state predictor is proposed and applied to regulate the steam temperature of the superheater, and it is compared with the conventional PI controller operated in the thermal power plant in view of control performance.

STEAM DRUM DESIGN FOR A HRSG BASED ON CFD (수치해석을 이용한 HRSG(Heat Recovery Steam Generator) 증기 드럼 설계)

  • Ahn, J.;Lee, Y.S.;Kim, J.J.
    • Journal of computational fluids engineering
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    • v.16 no.1
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    • pp.67-72
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    • 2011
  • HRSG (Heat Recovery Steam Generator) is a boiler to recover heat from the exhaust gas of an engine and to generate steam for more power generation or process. For the HRSG, water-tube type boiler is commonly adopted to accommodate the working pressure or capacity requirement of the system. The water-tube type boiler has a steam drum to separate steam from the water-steam mixture supplied from the evaporator tube (riser). The drum should be sized properly to separate the steam by the gravity and auxiliary internals, such as a demister, which are installed to filter the steam. To size the steam drum and to estimate the filter efficiency of drum internals, the velocity distribution inside the drum needs to be identified. In the present study, a series of CFD has been conducted to find the velocity distributions inside steam drums for conventional HRSGs and water-tube type industrial boilers. The velocity distributions obtained from the simulation have been normalized and a correlation to predict them has been found. The correlation is applied to the steam drum design by determining a proper position of a demister to show proper separation performance.