Fig 1 - uploaded by Xiangyu Shao
Content may be subject to copyright.
Source publication
In some hydrogen production, storage and applications, the flare stack is used as an indispensable protection system for the emission and ignition of surplus hydrogen. However, there is a risk of flameback when emissions at small flow rate. Thus, a series of studies were carried out to explore the flameback identification and air intrusion preventi...
Contexts in source publication
Context 1
... judging whether the hydrogen flare stack is flameback by simple algebraic calculation. Based on the proposed flameback identification method, the essence of the air intrusion prevention method is quantitatively revealed. These findings provide a valuable theoretical basis for the future development of safe disposal systems for excess hydrogen. Fig. 1 shows a schematic diagram of the flare stack, and different parts are distinguished by color. Among them, purple represents the gas collection tube. This tube is responsible for mixing H 2 and N 2 before they enter the flare stack barrel. The red portion signifies the flare stack barrel. The blue corresponds to the flare stack head, ...
Context 2
... within the range of 40 %-56 %, it was difficult for air to intrude the flare stack. The auxiliary N 2 flow must ensure that the N 2 mole fraction in the flare stack gas mixture reaches at least 40 vol%. The ultimately determined N 2 assisted flow was 53.41 L/ min, resulting in a N 2 mole fraction of 42 vol% when mixed with 74.26 L/min H 2 flow. Fig. 10 shows the gas mole fraction, vector, and the flammable range contour in the x = 0 plane when N 2 assisted pressurization (case 3). More detailed conditions are shown in Table 5. There are several findings: 1) We can find that the deepest intrusion distance of the flammable range of case 3 and case 2 is similar, only 0.03 m. The results ...
