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Research Papers: Operations, Applications & Components

Development of a Scrubber in the Deaerator

[+] Author and Article Information
Sungyeoul Lee

Mechanical Engineering Department,
Hanyang University,
222 Wangsimni-ro,
Seongdong-gu,
Seoul 133-791, Korea
e-mail: sungyi09@hanyang.ac.kr

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received July 5, 2013; final manuscript received August 28, 2014; published online November 21, 2014. Assoc. Editor: Allen C. Smith.

J. Pressure Vessel Technol 137(2), 021602 (Apr 01, 2015) (8 pages) Paper No: PVT-13-1108; doi: 10.1115/1.4028472 History: Received July 05, 2013; Revised August 28, 2014; Online November 21, 2014

A new design of a scrubber has been developed and used in a deaerator. Deaeration of feed water in the boiler system is an essential process in industry today. Any facilities operating with steam have at least one deaerator to remove dissolved oxygen from the feed water. For an efficient removal process, the feed water has to be heated up to the saturation temperature at the pressure in the outlet section of scrubber. Numerical simulations were conducted for various designs of a scrubber with data used in the power plant industry in Korea and an efficient design was drawn from the numerical results. Experiments were conducted with new design of the scrubber for operating conditions similar to those in a power plant. The experimental results showed an excellent deaerator performance, satisfying the standard requirement of dissolved oxygen level of 5–7 ppb in industry.

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Figures

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Fig. 1

Schematic of deaerator for experiment

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Fig. 2

Diagrams of the scrubber designs

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Fig. 3

Three-dimensional mesh geometry of the scrubber

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Fig. 4

Shape and temperature distribution for existing scrubber at t = 30.0 s

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Fig. 5

Shape and temperature distribution for scrubber with multi nozzle water inlet at t = 30.0 s

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Fig. 6

Shape and temperature distribution for scrubber with multi holes steam inlet at t = 8.87 s

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Fig. 7

Velocity distribution for scrubber with multi holes steam inlet at t=2.0s

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Fig. 8

Temperature distributions with variation in geometry of scrubber at t=3.0s

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Fig. 9

Temperature distributions for various fabrication of scrubber

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Fig. 10

Diagram and photo of experimental deaerator

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Fig. 11

Diagram and photo of scrubber

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Fig. 12

Temperature variation in deaerator with time

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