Chapter 90

Hearing the question, Ruan Wenming turned his head in surprise, and then saw two people, a middle-aged man and a young man; these two……

"Are you workers from our factory? I… don't recall…"

"Factory Director, they definitely aren't from our factory!"

"That's right, these two… they couldn't be here to steal……"

Now, the factory doesn't pay wages; when workers get off work, they take some scrap metal home, and this has even become a semi‑open secret. But the scrap metal taken keeps dwindling, and sooner or later problems will arise—so we might as well seize the opportunity……

"We're from Ha Gong Da." Qin Miao said: "This is my teacher."

Ha Gong Da!

The guy who just wanted to frame them hastily shut his mouth, wishing he could slap himself twice—Ha Gong Da, where the teachers and students are all awesome, especially in the past few months, hearing they've taken on many projects and made a lot of money……

Ruan Wenming's face lit up instantly: "Teachers from Ha Gong Da, welcome! To come to our little factory brings glory! By the way, you just asked about our boiler problem… the biggest issue is that the combustion thermal efficiency doesn't meet the standard; the state just issued boiler standards this year, and industrial boilers must have a thermal efficiency of at least sixty‑five percent……"

Qin Miao nodded, as the nation's gates opened and it began contacting abroad, realizing its backwardness, it must catch up; this outdated Soviet‑era boiler standard is long obsolete!

Advanced subcritical boilers in the world can achieve thermal efficiencies of over eighty‑five percent! Supercritical boilers can even exceed ninety percent!

Using such boilers for power generation, the final power‑generation efficiency can reach as high as thirty‑eight percent!

Domestically? Few boilers exceed fifty percent thermal efficiency; now the state has first set the standard at sixty‑five percent, already stumping a large number of boiler factories.

Large boiler factories certainly have ways to solve it, but Red Flag Boiler Factory…… it's too hard!

"This shouldn't be hard to achieve, right?"

"Not hard? Kid, you're really talking big without feeling any back pain!" The worker nearby who had just wanted to frame them gave Qin Miao a sideways glance: "If we really had to follow that standard, now in Ha Cheng, aside from the First and Second Boiler Factories, all other factories' boilers are non‑compliant!"

"Old Wei, don't talk nonsense! To us it seems difficult, but in front of the Ha Gong Da teachers it's nothing at all!" Ruan Wenming looked toward Zhou Ding: "Did you come this time to help us solve the boiler problem?"

Of course not! We're here to inspect the Red Flag Boiler Factory! Zhou Ding wanted to explain their purpose, but seeing the other party's expectant gaze, he also felt somewhat reluctant...

I also wanted to help, but I don't know how!

"If you want the boiler's thermal efficiency to meet standards, you must use double-layer reverse combustion." At that moment, Qin Miao spoke.

Everyone was stunned, even Zhou Ding was a bit surprised—did Qin Miao also know how to design boilers?

"What is double-layer reverse combustion?" Ruan Wenming got excited; he had heard this term from an engineer at Harbin First Boiler Factory, but he didn't know the specifics.

"Well, our boiler's furnace needs to be divided into upper and lower parts; thus, the flue gas produced from combustion below enters the upper combustion chamber through the throat on the furnace arch, where it mixes with the secondary air entering from the upper furnace door and continues to burn..."

This isn't some advanced technology; many units in the capital later use this double-layer reverse combustion boiler for heating coal to raise standards.

All the worker masters widened their eyes.

"Come, this teacher, could you draw us a diagram?"

"No problem at all." Qin Miao picked up chalk and directly drew a diagram on the steel plate of the boiler's outer shell.

"The benefit of doing this is that the flue gas undergoes secondary combustion, raising efficiency; these hot flue gases, after radiative heat transfer on the heated surfaces in the furnace, still need to enter the annular smoke box for further convective heat transfer, further increasing efficiency, and finally are discharged into the atmosphere via the chimney..."

There's more to it!

"Then how big should the furnace be designed? How do we determine the exact dimensions?"

"Well, that can only be known after calculation; you need to calculate based on the boiler's size, required heat supply, whether the boiler produces superheated steam or high-pressure steam, etc."

Everything said was professional jargon!

Wei Guoqiang, who had just looked down on Qin Miao, now wore a fawning expression, taking out a cigarette from his pocket: "Come, brother, have a smoke, take a break, and later let's work out the specifics?"

"That won't do; we need to go back to school and use a computer for detailed design and calculation."

Everyone present looked at each other, feeling somewhat... embarrassed.

If we stayed to do a rough calculation, at most it would be treating someone to a meal; taking it back to Ha Gong Da to compute with whatever computer would be a commissioned design, which requires payment.

Given the factory's current state, where would they get money to buy a design!

"Since we're letting Ha Gong Da design it, it certainly can't be subpar; we must design this boiler to have a thermal efficiency of at least seventy percent or more!"

Seventy percent!

Qin Miao's words again boosted everyone's confidence.

"If the thermal efficiency is above seventy percent, it will surely become a national high-quality product!"

"Exactly, once our factory has an advanced product, we won't let other factories copy it; we'll keep it all to ourselves!"

"Ah, two teachers from Ha Gong Da, I won't hide it from you—our Red Flag Boiler Factory has had poor benefits for years; we're just a collective enterprise and receive no subsidies. To develop this new boiler, we've put all our factory's funds into it and even borrowed 500,000 from the bank..."

Factory Director Ruan Wenming felt a bit embarrassed: "Could you first give us a design? Once our factory sells the boilers and makes money, we will definitely pay you the design fee..."

At that moment, a person rushed in from outside.

"Factory Director, factory director, good news, good news!"

The comer arrived like a gust of wind—his words came before he did.

"The city office just called, saying our factory might be allocated to Ha Gong Da to become their school-run factory; we need to tidy up, but must not leak anything—especially our factory's debt, which must not be known to Ha Gong Da before they agree... Hmm, these two people look unfamiliar—where did they come from?"

Looking at the somewhat suspicious female secretary, Qin Miao smiled: "Older sister, we're from Ha Gong Da, here to inspect the Red Flag Factory's situation."

Instantly, the female secretary's face turned ashen, and everyone else's faces also whitened in a flash.

"We're doomed! Factory Director Ruan, indeed you can't do anything right!"