Experimental optimization of a spray tower for ammonia removal

Jafari, Mohammad Javad; Matin, Amir Hossein; Rahmati, Alireza; Azari, Mansour Rezazadeh; Omidi, Leila; Hosseini, Seyed Saeed; Panahi, Davoud

doi:10.1016/j.apr.2018.01.014

Cited by 53 publications

(26 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Most of the studies about open scrubbing towers are conducted by experiments and theoretical analysis. Jafari et al [14] developed an open scrubbing tower through optimization of the design and operating parameters for removal of ammonia emissions from the air streams by experiments. Mohan et al [15] carried out the experiment on the performance of a spray tower for removal of fine particulate matter and developed a correlation to quantify the performance of the tower.…”

Section: Introductionmentioning

confidence: 99%

Optimization Investigation on Operating Parameters of a Scrubbing Tower Using a Genetic Algorithm

Wang

Song

et al. 2020

Chem Eng & Technol

View full text Add to dashboard Cite

To solve the problem of coke powder entrainment towards the main fractionator in a delayed coking unit, an open scrubbing tower can be installed instead of filtration. Based on a particle scavenging model, a gas‐liquid‐solid three‐phase numerical method was adopted to simulate the process of particle removal. Besides, the effects of particle size, droplet size, gas velocity, and droplet flow rate are quantitatively assessed using the genetic aggregation response surface method. The results indicate that the formation of a liquid film can promote the heat transfer and particle removal. The collection efficiencies of interception and diffusion are much less than that of impaction. After response surface analysis, the local sensitivity of operating parameters and the optimized point are obtained.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimization Investigation on Operating Parameters of a Scrubbing Tower Using a Genetic Algorithm

Wang

Song

et al. 2020

Chem Eng & Technol

View full text Add to dashboard Cite

show abstract

“…The spray tower scrubber is the common type of wet scrubber that removes impurities and dust from gases that are readily soluble in the spray liquid absorbent (Schifftner 1996). That is why this kind of scrubber is proposed in literature for desulphurization (Yeh and Rochelle 2003;Codolo and Bizzo 2013;Marocco and Inzoli 2009;Zhen et al 2017), denitrification (Jafari et al 2018;Javed et al 2006) or, recently, even to remove carbon dioxide (Kuntz and Aroonwilas 2009;Koller et al 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Koller et al (2011) and Kuntz et al (2009) checked how droplet sizes can contribute to the removal of CO2. In addition, Koller et al (2011), Jafari et al (2018, Codolo and Bizzo (2013) presented the effect of the number of nozzles on the speed of dirt removal. Codolo and Bizzo (2013), during testing the SO2 removal efficiency, drew the following conclusionthe removal efficiency is dependent on the diameter of the nozzle opening.…”

Section: Introductionmentioning

confidence: 99%

“…Codolo and Bizzo (2013) also suggest that the number of spray nozzles employed can also affect the removal efficiency, because it changes the coverage of the volume of the tower by the droplets. Jafari et al (2018) demonstrated that working pressure plays an important role in removing contaminants, and Wang et al (2019) showed that an increase in spray density particularly affects the effective removal of small particles (less than 10 μm). Works (Marocco and Inzoli 2009;Wrzesinska and Witman 2009) presented how the ratio of volume of liquid to volume of gas at given levels of the tower affects the efficiency.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of the Spray Scrubber Geometry on the Efficiency of Dust Removal – Theoretical Predictions and CFD Analysis

Tomaszewski¹,

Przybyliński²,

Kapica³

et al. 2020

JAFM

View full text Add to dashboard Cite

The article presents a method of purification of synthesis gas (syngas) produced as a result of biomass gasification with the use of a spray scrubber. The authors focus on the presentation of how individual elements of the geometry of a spray scrubber can influence its particle removal efficiency. The paper examines cases of dry particle removal, the use of demisters in purification process and wet scrubber collection efficiency with the use of numerical fluid mechanics (CFD). General equations are also used by authors to determine the initial predictions. The key part of the article is to present the results of the velocity and pressure distribution depending on the scrubber construction, determine the effect of the number of demisters used on the particle removal efficiency and to determine the probability of coalescence depending on the size of liquid droplets. Moreover, the authors formulate a simplified formula for the collection efficiency of a scrubber which is consistent with the results obtained from CFD calculations. The numerical results of collection efficiency were compared with experimental data from literature.

show abstract

“…In terms of improving the mass transfer of the WFGD system, the most commonly used method is to introduce internals in the scrubbing tower . Practical application proved that the alloy porous tray and the swirling coupling device were conducive to change the gas‐liquid flow condition and improve the mass transfer process . However, the improvement of the two devices was limited in ultra‐low emission, or was significantly reduced in low‐load operational conditions .…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on flue gas purification and gas‐liquid multiphase flow in a spraying column with perforated plate

et al. 2020

View full text Add to dashboard Cite

The synergetic removal of sulphur dioxide and particulate matters (PM) in flue gas was investigated in a spraying column equipped with flow pattern controlling (FPC) internals. The performance of the novel column was compared with that of the traditional open column by monitoring the removal efficiency and system pressure drop. To understand the gas-liquid multiphase flow field and mass transfer process inside the column with different structures, image processing based on the Otsu method and particle image velocimetry (PIV) technology were used. It was found that the FPC column with a section size of 200 mm × 200 mm, hole diameter of 4 mm, and aperture ratio of 0.65 demonstrated the best performance. As clearly observed from the flow filed, bubble flow was formed in FPC column, while the dispersive and falling-film flow was developed in the open column. The liquid holdup in FPC unit was much more than in the open spraying column, which enhanced the mass transfer process. According to the PIV results, the reverse flow of the liquid, caused by the gas jet ascribed to the perforated plate and the confined space in the FPC unit, was the primary reason for bubble generation and the gas-liquid flow pattern in the column. K E Y W O R D S desulphurization, flue gas, gas-liquid multiphase flow, particulate matter

show abstract

Experimental optimization of a spray tower for ammonia removal

Cited by 53 publications

References 22 publications

Optimization Investigation on Operating Parameters of a Scrubbing Tower Using a Genetic Algorithm

Optimization Investigation on Operating Parameters of a Scrubbing Tower Using a Genetic Algorithm

Influence of the Spray Scrubber Geometry on the Efficiency of Dust Removal – Theoretical Predictions and CFD Analysis

Experimental investigation on flue gas purification and gas‐liquid multiphase flow in a spraying column with perforated plate

Contact Info

Product

Resources

About