Flow characteristics according to internal structure of square wet scrubber

Lee, Sang‐Min; Kwon, Byung-Min; Park, Kweon-Ha

doi:10.5916/jkosme.2019.43.1.1

Cited by 4 publications

(2 citation statements)

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“…Table 2 presents the chemical composition of the modified green death solution, which contains sulfuric acid (H 2 SO 4 ) and hydrochloric acid (HCl) and simulates the environment of a desulfurization device [15]. The temperatures were selected based on the flow characteristics with the internal structure of the wet scrubber [16]. This study reported that the temperature of the exhaust gas approached 100 • C due to the gas's concentration phenomenon and that after the gas passed a certain height, a uniform temperature of no more than 30 • C on average was maintained because heat exchange with the cleaning solution hardly occurred.…”

Section: Experimental Methodsmentioning

confidence: 99%

Electrochemical Properties of Super Austenite Stainless Steel with Temperature in a Green Death Solution

Hwang

Kim

2023

Coatings

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In this investigation, potentiodynamic polarization experiments were conducted on UNS S31603 and UNS N08367 in a modified green death solution, which simulates the environment of a desulfurization device (scrubber), using temperature as a variable. A Tafel analysis showed that the corrosion current density of UNS S31603 at the highest temperature (90 °C) was approximately 4.5 times higher than that of UNS N83067. A surface analysis using a scanning electron microscope revealed that pitting and intergranular corrosion occurred simultaneously in UNS S31603, whereas UNS N83067 exhibited a stronger tendency toward intergranular corrosion. After electrochemical experiments, the corrosion rates according to maximum damage depth were compared with the corrosion rates according to corrosion current density; the relationships between the two values were expressed as α values. The α values of UNS N08367 were higher than those of UNS S31603, indicating that the local damage rate of UNS N08367 was higher.

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Section: Experimental Methodsmentioning

confidence: 99%

Electrochemical Properties of Super Austenite Stainless Steel with Temperature in a Green Death Solution

Hwang

Kim

2023

Coatings

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“…The International Maritime Organization (IMO), a specialized agency of the United Nations (UN), proposed a 0.1% sulfur content limit in fuels in the emission control areas (ECAs) from 2015, and a 0.5% sulfur content limit in areas other than ECAs from 2020 [1]. It is mandatory to use emission post-processing devices that have equal or greater effect than using low sulfur fuel [2].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Composite Scrubber with Built-In Silencer for Marine Engines

Ryu

Park

2021

JMSE

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The International Maritime Organization (IMO) is strengthening regulations on reducing sulfur oxide emissions, and the demand for reducing exhaust noise affecting the environment of ships is also increasing. Various technologies have been developed to satisfy these needs. In this paper, a composite scrubber for ships that can simultaneously reduce sulfur oxide and noise was proposed, and the flow characteristics and noise characteristics were analyzed. For the silencer, vane type and resonate type were applied. In the case of the vane type, the effects of the direction, size, and location of the vane were analyzed, and in the case of the resonate type, the effects of the hole location and the number of holes were analyzed. The result shows that the length increase of the vane increased the average transmission loss and had a great effect, especially in the low frequency region. The transmission loss increased when the vane was installed outside, and the noise reduction effect was excellent when the vane was in the reverse direction. In the resonate type, increasing the number of holes is advantageous for noise reduction. The condition for maximally reducing noise in the range not exceeding 840 Pa, which is 70% of the allowable back pressure, is a vane length of 225 mm in the outer vane reverse type. The pressure drop under this condition was 777 Pa, and the average transmission losses in the low frequency region and the entire frequency region were 43.5 and 54.5 dB, respectively.

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