Cracking in a Boiler Steam Drum

Ethylene yield is significant in showing the performance of the steam cracker furnace in the olefin plant. This study was conducted in the actual large-scale olefin plant to see the impact of various variables towards the ethylene yield. The analysis was conducted utilizing Regression Analysis in Minitab Software Version 18 to develop a reliable ethylene yield model. The model concluded that ethylene yield in the studied plant was contributed by the factor of -0.000901, 0.02649, -0.282, 0.16, -0.0834, 0.1268, and 0.0057 of Hearth Burner Flow, Integral Burner Flow, Steam Drum Pressure, Super High-Pressure Steam (SHP) Boiler Feed Water Flow, SHP Flow, Naphtha Feed Flow, and Stack NOx Emission respectively. The Response Optimizer tool also showed that the ethylene yield from naphtha liquid feed utilizing pyrolysis cracking can be maximized at 32.55% with control setting at 9,476.41 kg/hr of Hearth Burner Flow, 608.56 kg/hr of Integral Burner Flow, 112.93 Barg of Steam Drum Pressure, 109.11 t/hr of SHP Boiler Feed Water Flow, 86.42 t/hr of SHP Flow, 63.49 t/hr of Naphtha Feed Flow and 126.23 mg/m3 of Stack NOx Emission.

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Steam drum level dynamics in a multiple loop natural circulation system of a pressure-tube type boiling water reactor

Annals of Nuclear Energy ◽

10.1016/j.anucene.2011.06.007 ◽

2011 ◽

Vol 38 (10) ◽

pp. 2227-2237 ◽

Cited By ~ 2

Author(s):

Vikas Jain ◽

P.P. Kulkarni ◽

A.K. Nayak ◽

P.K. Vijayan ◽

D. Saha ◽

...

Keyword(s):

Natural Circulation ◽

Boiling Water ◽

Pressure Tube ◽

Circulation System ◽

Boiling Water Reactor ◽

Water Reactor ◽

Tube Type ◽

Steam Drum

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Design & Analysis of Steam Drum Based on ASME Boiler and Pressure Vessel Code, Section VIII Div.2 & Div.3

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.852.511 ◽

2016 ◽

Vol 852 ◽

pp. 511-517

Author(s):

Vishal Payghan ◽

Dattatray N. Jadhav ◽

Girish Y. Savant ◽

Sagar Bharadwaj

Keyword(s):

High Pressure ◽

High Temperature ◽

Pressure Vessel ◽

Design Parameters ◽

Plastic Collapse ◽

Finite Element Stress Analysis ◽

Process Plant ◽

Section Viii ◽

Design Requirements ◽

Steam Drum

Process plant industries have equipment working on high pressure and high temperature environments. The ASME Boiler and Pressure Vessel Code, Section VIII provides rules for construction of the pressure vessel. The purpose of this paper is to have comparative study for design and analysis of steam drum using ASME Section VIII Div. 2 and Div. 3. Steam drum is a part of boiler system and works at high pressure and high temperature. Normally, Steam drum design is based on ASME Section VIII Div. 2, Part 4, design by rule and Part 5, design by analysis; which has been carried out in the present study. In this paper, design of the same equipment is studied using Part KD, Design requirements of ASME Section VIII Div. 3 with similar design parameters. Finite Element Stress Analysis of both design has been done as per code requirements to check the plastic collapse. In this study, it is observed that there is reduction in the required thickness for design based on Div. 3. Finally, the reduced required thickness leads to considerable weight reduction of the equipment and thus increased competitiveness.

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Experience with the Acoustic Emission Monitoring of a Steam Drum Nozzle in a CANdu Nuclear Generating Station

Acoustic Emission Monitoring of Pressurized Systems ◽

10.1520/stp35082s ◽

2009 ◽

pp. 165-165-12

Author(s):

JA Baron

Keyword(s):

Acoustic Emission ◽

Acoustic Emission Monitoring ◽

Emission Monitoring ◽

Steam Drum

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Dynamics Analysis of a Nuclear Boiler

Proceedings of the Institution of Mechanical Engineers ◽

10.1243/pime_proc_1965_180_031_02 ◽

1965 ◽

Vol 180 (1) ◽

pp. 417-449 ◽

Cited By ~ 1

Author(s):

P. K. M'Pherson ◽

G. B. Collins ◽

C. B. Guppy ◽

A. Sumner

Keyword(s):

Dynamic Performance ◽

Strong Dependence ◽

Computing Methods ◽

Analogue Computer ◽

Dynamics Analysis ◽

Plant Design ◽

Two Phase ◽

Full Power ◽

Computer Studies ◽

Steam Drum

A dynamics analysis of a nuclear boiler based on a steam-generating, pressure-tube, heavy-water-moderated design is presented. In effect the plant is very similar to a La Mont recirculating cycle. A detailed mathematical model to represent plant dynamics (linearized, full power) is discussed with special reference to the boiling channel, steam drum, and recirculating loop. A simplified model is derived for analogue computer studies. Dynamic performance is discussed in terms of: (1) boiler only (no reactivity feedbacks): influence of pressure feedbacks, steam drum design, subcooling, recirculating delay; (2) complete plant (including reactor): as above but including influence of void coefficient. The two most important results are: (1) the strong dependence of plant behaviour/stability on the degrees of float allowed to pressure; (2) the possibility of designing an inherently stable and self-regulating plant with a small positive void coefficient. Finally, conclusions are drawn on the complete dynamic analysis under the heads: (1) optimal plant design; (2) control system design; (3) development of analytical/computing methods; (4) research into two-phase physics.

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Fitness-for-Service and Remaining Useful Life Assessment of a Steam Drum

Design and Analysis Methods and Fitness for Service Evaluations for Pressure Vessels and Components ◽

10.1115/pvp2003-1926 ◽

2003 ◽

Author(s):

Raymond K. Yee

Keyword(s):

Power Plant ◽

Small Sample ◽

Analysis Procedure ◽

Remaining Useful Life ◽

Operating Conditions ◽

Life Assessment ◽

Life Evaluation ◽

Useful Life ◽

Size Evaluation ◽

Steam Drum

A steam drum in a typical power plant has experienced in-service cracking. Nondestructive examinations (NDE) were performed and a small sample was collected from the drum to evaluate the extent of the cracking that had occurred in the drum shell. Fitness-for-service and remaining useful life analyses of the drum were performed based on the NDE results and operating conditions. In this paper, the fitness-for-service analyses of the steam drum are described. The analysis procedure, material property determination, stress analysis, limiting flaw size evaluation, and remaining useful life evaluation for the drum are discussed. Recommendations for appropriate action are also presented.

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Energy Consumption Analysis of Deep Peak Regulation in a 300MW Plant With Subcritical Steam Drum Furnace

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/440/3/032025 ◽

2020 ◽

Vol 440 ◽

pp. 032025

Author(s):

Ke Liu ◽

Jinbiao Liu ◽

Haichao Wang ◽

Xingsen Yang ◽

Shouen Wang ◽

...

Keyword(s):

Energy Consumption ◽

Energy Consumption Analysis ◽

Steam Drum

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Design of Fuzzy PID Controller for Water Level of Boiler Steam Drum Based on DSP

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.130-134.3455 ◽

2011 ◽

Vol 130-134 ◽

pp. 3455-3458

Author(s):

Yuan Fang Xin

Keyword(s):

Control System ◽

Fuzzy Control ◽

Water Level ◽

Pid Controller ◽

Good Control ◽

Fuzzy Pid ◽

Control Effect ◽

Fuzzy Pid Controller ◽

Steam Drum ◽

Pid Arithmetic

A control system for water level of boiler steam drum based on DSP microprocessor is designed in this paper. The technique of fuzzy control was applied to controlling the water level of the steam drum, the operational principle and application of the fuzzy-PID arithmetic are described. The water level controller with good control effect is developed. Firstly the hardware structure of system is introduced in the paper and then investigates the fuzzy-PID arithmetic carry out, and finally, the simplified program flowchart are given.

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