At this time, the fire on the source side seemed to cooperate with the man's words, and not long after the man finished speaking, there was a loud bang again on the source of the fire. ̄)〕sんц閣浼镄嗹載尛裞閲渎棢つ%.%ā

Touch!

Another explosion!

However, this time the explosion was much smaller than the previous two, but it couldn't stand Shen Mingkai They were very close to the source of the fire, and the moment they heard the loud noise, they were immediately shocked to the point of splitting headaches, their ears were buzzing, and they also clearly felt that there was an invisible powerful thrust surging towards them, but that thrust was not enough to push them.

And with that loud noise, the fire not far from them also increased again and again in an instant.

The thrust was not very large, Shen Mingkai calmed down after a while, so he looked in the direction of the fire, and at this moment, the voice of the firefighter who was the leader of the team sounded in Shen Mingkai's ears again.

"There was such an explosion just now when we sprayed water, but that explosion was much larger than this one, and the thrust caused by the explosion directly lifted us here, which injured us all......"

However, Shen Mingkai didn't pay attention to the fireman, but kept staring at the raging fire, because, at the source of the fire, Shen Mingkai saw the appearance of a house in a trance, so Shen Mingkai slowly walked towards the source of the fire......

"Shen Shao!"

"Shen Shao......"

The firefighters behind Shen Mingkai saw Shen Mingkai walking towards the source of the fire, they didn't know what Shen Mingkai was going to do, and they didn't know why Shen Mingkai was walking towards the source of the fire, so they called Shen Mingkai worriedly.

However, I saw Shen Mingkai raise his right hand and give them a silent gesture, signaling them not to worry, and then walked towards the source of the fire alone.

Shen Mingkai walked about three meters away from the fire before stopping, he carefully looked at the fire that made a bumping sound from time to time, and finally, Shen Mingkai locked his eyes on the source of the fire.

The sound of the fire at the source is the most frequent, and the most peculiar thing is that the fire at the source is a light blue flame, which is completely different from ordinary flames, and this also reminds Shen Mingkai of what the firefighters just said, the first explosion was because the firefighters sprayed a large amount of water on the burning trees, and a large amount of water was poured on the burning trees at once, which would isolate the trees from the oxygen in the air, and it stands to reason that the trees should not rekindle. But the fact is that the trees have rekindled, and the fire is even more presumptuous than the previous one, and even drove the fire of the entire mountain forest to burn wildly.

Thinking of this, Shen Mingkai moved his gaze that stayed at the source of the fire to the side, he slowly looked towards the sky, and at this moment, he saw that the big trees around him that were not on fire, their branches in the sky were shaking violently together, and they were all inclined in one direction.

"East!"

Shen Mingkai said and looked in the direction where the fire was spreading, and sure enough, the fire was spreading in the direction of due east.

So Shen Mingkai shifted his gaze to the fire source again, he stared at the fire source exploratory, and saw that the burning of the fire at the fire source was exceptionally regular, and it was not so much regular as the burning of the fire was hierarchical, and there were many levels of burning

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Seen in the construction of houses, is it ......

After a long time, Shen Mingkai finally figured out that the way to quickly extinguish the forest fire is not an ordinary sprinkler fire, but a foam fire extinguisher.

"Take them, let's go out!"

After figuring it out, Shen Mingkai quickly returned to the firefighters and commanded.

Although the firefighters didn't know what Shen Mingkai had just done, they all looked excited when they heard Shen Mingkai say that they were going back, so they followed behind Shen Mingkai and slowly walked back following the traces when they came.

It didn't take long for Shen Mingkai to take the group of firefighters back to the periphery of the forest fire, although the previous squad of firefighters didn't say anything, they were indeed seriously injured, otherwise they wouldn't have been trapped in the forest for so long and couldn't get out.

Seeing Shen Mingkai come out of the mountains and forests, the people around the mountains and forests were very happy, including the group of reporters who also cast their eyes of appreciation and admiration, and the happiest thing in this is the director, he can see Shen Mingkai come out safe and sound, he is the most relieved person, fortunately Shen Mingkai is fine, otherwise how can he explain to the people of All-Star City, a person who is the most eye-catching person in Star City, was injured in the most protected green mountain forest reserve in Star City, he is really not easy to explain.

"Shen Shao, you're back!" The director hurriedly greeted him.

"Director, the current way of extinguishing fires doesn't work, switch to foam fire-fighting methods!" As soon as he saw the director, Shen Mingkai immediately said to the director, but listening to his tone, it didn't look like "tell" at all, but more like "order".

"Good!" Hearing Shen Mingkai's commanding tone, the director didn't feel anything wrong, so he agreed very sincerely.

I saw the director turn around, with a serious face, and waved at the commander, and the commander was on the side as if he was on standby, as soon as he saw the director beckoning, he quickly ran to the director's side, and said with some flattery: "Director!" ”

"Go! Let those subordinates immediately switch to foam fire extinguishing methods to extinguish fires, ordinary fire extinguishing methods will not work at all! The director gave some reprimanding orders to the commander, and his tone was full of contempt and disdain.

"Okay...... the commander snapped, and then ran out as fast as he could, ordering his firefighters to change the way they put out the fire.

"You guys, don't put out the fire with water here, hurry up and get that pipe full of foam, use foam to extinguish the fire, hurry!" The commander ordered the firefighters.

"Go! Go ......."

Shen Mingkai and the director quietly looked at the group of firefighters on the side, their expressions were very serious and expectant, especially Shen Mingkai, he looked serious and confident, and the director muttered on the side, what did Shen Mingkai find in the mountains and forests, why did he say that this fire extinguishing method was not right as soon as he came back, but to use a foam fire extinguishing method, and finally, the director couldn't help but speak.

"Shen Shao! What did you see when you went deep into the mountains and forests? The director asked cautiously, because he saw that when he opened his mouth to ask Shen Mingkai, Shen Mingkai's eyebrows furrowed slightly.

"Go, find a team of people, and follow the traces of us to the depths of the mountains and forests to extinguish the fire with foam fire."

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Shen Mingkai did not answer the director's question, but once again "ordered" the director to do things.

"Good!" Although the director was a little annoyed when he heard Shen Mingkai's order this time, the director did not want to go against Shen Mingkai's will, only to see the director obey Shen Mingkai's will again.

After a while, after the director finished instructing the commander, he came to Shen Mingkai's side.

This time, Shen Mingkai took the initiative to explain the reason why he asked the director to use foam fire extinguishing.

"Because there are gas reagents in the depths of the mountains and forests!"

"What?" After hearing Shen Mingkai's words, the director was immediately shocked by what Shen Mingkai said, gas reagent! How could that kind of thing appear in the depths of the mountains and forests?

"The source of the fire was a house made of trees, and the flame from the burning of the contents was pale blue, and the light blue flame from the combustion of oxygen was only hydrogen, so I concluded that it was the hydrogen that came from the small tree house that provided the fire in it."

"Hydrogen ......" The director of the bureau immediately felt that it made sense when he heard Shen Mingkai's analysis, but he had a lot of questions, so he only listened to the director and asked suspiciously: "If hydrogen and oxygen are burning, then why did there only three explosions, but not all the time?" ”

After Shen Mingkai heard the director's question, he glanced at the director lightly and said: "Only impure hydrogen and oxygen combustion will cause an explosion, and there is an explosion limit between these two gases, only when the hydrogen concentration is between 4% and 75.6%, the two gases will cause an explosion when they encounter high temperatures." ”

"Ahh Hearing Shen Mingkai's explanation, the director let out a long sigh and nodded a little understandingly, "However, the hydrogen in the small tree house deep in the mountains and forests, after such a long time of spreading and dissipating, should now have a very low concentration, why is the concentration of hydrogen still so coincidentally maintained between the explosion limits and causing an explosion?" And, it also spreads to the periphery of the mountain forest? ”

Hearing the director's question, I saw Shen Mingkai leave the director of the bureau and turn to the forest fire, and then said to the director: "As soon as the water they spray comes into contact with those burning trees, the contact between the trees and oxygen is reduced, so that in the reaction between hydrogen and oxygen, the oxygen concentration decreases, and the concentration of hydrogen gas on the contrary increases, which increases the concentration of hydrogen to the concentration specified in the explosion limit, and causes an explosion. This is the reason why the firefighters who entered the forest not only did not have an effect on extinguishing the fire with water, but also caused an explosion in the forest, making the fire burn more vigorously. And hydrogen reaches the periphery because of the wind. ”

"Wind?!" The director was even more puzzled, "How can the wind make hydrogen reach the periphery of the mountains and forests?" ”

"Hydrogen is the lightest dense and most easily blown by the wind, and today it just happened to be windy, it was due east, and wherever the fire spread, it was because of the hydrogen, so the fire in the mountain forest spread in the way of due east, so that it did not cause the fire of the entire mountain forest."

"I see!" The director lowered his head and said silently, and then the director raised his head again and looked at Shen Mingkai with some admiration, "So Shen Shao reminded us and let us take the foam fire extinguishing method......

At this time, around the small tree house in the mountain forest, Lin Xinning actually appeared......

(End of chapter)