A modified steady-state model for evaluation of ammonia concentrations behind a water curtain

Cheng, Chao; Tan, Wei; Du, Huang; Liu, Liyan

doi:10.1016/j.jlp.2015.05.018

Cited by 8 publications

(2 citation statements)

References 12 publications

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“…This solubility, similarly to other gases, decreases with temperature. However, at a temperature of 25°C, it is still possible to achieve a very high concentration of ammonia in solution, up to 31% by weight, which is the basis for the use of H 2 O in rescue operations (Cheng et al 2015). Ammonia becomes adsorbed on the surface of the droplets, penetrates them and falls with them.…”

Section: Introductionmentioning

confidence: 99%

Effect of mist nozzle supply pressure on the ammonia absorption process

2023

Archives of Environmental Protection

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The article shows the effect of the supply pressure of mist nozzles on the process of ammonia sorption. In the tests, the nozzles flow characteristics Q=f(p) and the dependence of NH 3 concentration as a function of the water stream feeding in time at different supply pressures were determined. For the TF 6 NN, TF 6 V, NF 15, CW 50 nozzles, measurements were carried out at the following supply pressures: 0.1 MPa; 0.2 MPa; 0.3 MPa; 0.4 MPa; 0.5 MPa. It was observed that the greatest effect of nozzle feed pressure on ammonia sorption efficiency may be expected at lower pressure values. At higher values, the sorption rate becomes stabilized and even starts to decrease. The decreases in the sorption rate constant observed for higher pressures may be due to a reduction contact time of the droplet and the achievement of the critical mixing rate of ammonia vapors in the air intensively saturated with water streams. This is due to diffusion rate limitations. The measurements show that the use of supply pressures for mist nozzles above 0.4 MPa is not justified. It should be noted that varying the feed pressure of nozzles of various designs can affect their ammonia sorption efficiency differently. The type of nozzle and supply pressure affects the distribution of droplets in space. The angle of dispersion and the shape of the generated jet have a critical influence on the efficiency of the sorption process. Complete filling of the space and a large spray angle assure relatively high sorption efficiency.

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Section: Introductionmentioning

confidence: 99%

Effect of mist nozzle supply pressure on the ammonia absorption process

2023

Archives of Environmental Protection

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“…The effectiveness of water curtains in relation to clouds of hazardous substances depends on the solubility of the given substance in water, the reactivity to it or to components comprised by it, and the rate of diffusion to the droplet interior [1]. This is reflected in experimental data, as the significant effectiveness of water has been observed for the elimination of vapours of such compounds, as ammonia, hydrogen fluoride, or hydrogen chloride [1][2][3][4][5][6][7][8][9][10][11]. However, in the case of chlorine occurs a low water curtains efficiency [9].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Water Curtain Effectiveness in the Elimination of Airborne Vapours of Ammonia, Acetone, and Low-Molecular Aliphatic Alcohols

Węsierski

Majder–Łopatka

2018

Applied Sciences

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The paper presents results of comparative tests related to the effectiveness of water curtains in the elimination of airborne vapours of ammonia, acetone, and low-molecular aliphatic alcohols. The determined effectiveness of water curtains for acetone and methanol is by about half an order of magnitude smaller than for ammonia. An evident reduction in curtain effectiveness was recorded with an increase of the length of aliphatic chain of alcohols. Tests conducted for the four lightest representatives of primary alkanols point to an evident decrease in t1/2 for further representatives according to the equation t1/2 = 203.3N − 41.5. It was found that methanol is removed by the curtain in the shortest time from among the tested alcohols (t1/2 = 137 s) and 1-buthanol the most slowly (t1/2 = 782 s). The obtained results indicate the effectiveness of water curtains in incidents that comprise uncontrolled release of vapours of compounds being tested.

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