On the eighth day of the first lunar month, after the Spring Festival holiday, the Provincial Chemical Design Institute resumed its normal work order.

A year ago, the design institute undertook a 130,000-ton urea engineering design contract from Jingxian Fertilizer Plant, and the design department was handed over to Xia Su, who naturally arranged the air compressor station to his apprentice Geng Zhiyuan to design.

The first time he was in charge of the main project design, Geng Zhiyuan was excited, but he didn't know how to start.

Air compressor station is the abbreviation of air compression station, and its main function is to provide qualified compressed air to chemical production equipment. Compressed air is divided into two types, one is the process air used in production, and the other is the instrument air used in the instrument pneumatic control valve.

Xia Su patiently explained to the apprentice the precautions and steps for the design and calculation of the air compressor station. The charm of intellectual women comes from knowledge, cultivation and connotation, and appearance is secondary. And Xia Su was born charming and moving, so she exuded a unique and charming temperament of wisdom, maturity, confidence and elegance in her gestures.

Geng Zhiyuan secretly admired: "Although my teacher is not as beautiful as Xiaoxiao, his temperament is much stronger than her. Xiaoxiao is still relatively immature, and she is not too confident in doing things, and I still have to encourage her a lot. ”

The design of the air compressor station first needs to determine the maximum gas consumption of the urea plant instrument, and then multiply it by the insurance factor, and select the appropriate model of air compressor unit in the samples provided by the major air compressor manufacturers based on this.

The estimated gas consumption of each production unit is 150 cubic meters per hour, which is converted into 2.5 cubic meters per minute, and the calculated value is 3.125 cubic meters per minute considering the 25% insurance coefficient.

Geng Zhiyuan carefully compared and selected the samples of an air compressor manufacturer that Xia Su gave him, and finally chose an air compressor with an exhaust pressure of 0.7MPa (G) and an exhaust volume of 3.3 cubic meters per minute.

After selecting the compressor, the air filter and air dryer are selected according to the air cleanliness requirements of the instrument, and finally an air buffer tank is selected. The role of the air buffer tank is similar to that of the secondary water tank of a high-rise residence, playing the role of stabilizing the pressure and providing continuous air supply in case of emergency.

After the selection of all the equipment listed on the equipment table was completed, Geng Zhiyuan began to draw a flow chart compared to the drawings of the air compressor station of the Jixian urea project with reference. The equipment is connected with relevant pipelines according to the material flow relationship, and then the pipe number is compiled, the material is selected, and the pipe diameter is determined.

Wang Ping once said that the design of the world is a big copy, although it is a bit exaggerated, but it is very reasonable. For example, the air compressor station, turning over and over is nothing more than those kinds of equipment, the process is naturally similar, there are drawings of other projects for reference, and the design is relatively simple.

To determine the pipe diameter, the preliminary pipe diameter should be calculated according to the common flow rate and flow rate of the medium, and then rounded upward. Geng Zhiyuan selected a flow rate of 10 m/s according to the recommended flow rate of compressed air in the manual, and then substituted the flow rate of 3.2 m3/min, and calculated the preliminary pipe diameter to be about 82.4 mm. The commonly used pipe diameter one level larger than this data is DN100, so Geng Zhiyuan selected the diameter of the compressed air pipe as DN100.

After the calculation came out, he was a little unsure, so he took it to the teacher for advice. Xia Su picked up his calculation book and read it, and said with a smile: "Xiao Geng, you made a mistake. The pipe diameter was chosen too large. ”

"Really?" Geng Zhiyuan hurriedly took the calculation book and carefully checked it twice, and said suspiciously: "Xia Gong, is it right?

Xia Su said with a smile: "The exhaust volume on the air compressor sample refers to the exhaust volume in the intake state, that is, under normal pressure. The exhaust pressure of the air compressor is 0.7MPa (G), which translates to a much smaller gas volume?"

"Oh! I see!" Geng Zhiyuan patted his head and said, "I forgot the pressure conversion!"

"It's okay, most people make mistakes when calculating air volume for the first time. Xia Su encouraged: "The philosopher said well, people cannot step into the same river twice. I am not afraid of making mistakes, but I am afraid that I will not be able to remember the lesson and make similar mistakes in the future. That's not stupid, it's stupid. ”

"Okay, teacher, I remembered!" Geng Zhiyuan nodded in shame, and quickly found a notebook and memorized the lesson carefully.

According to the exhaust pressure of the air compressor is 0.7MPa (G), the diameter of the compressed air pipe only needs DN32, in order to reduce the resistance loss, Geng Zhiyuan finally determined the diameter of the compressed air pipe to DN40.

Jingxian urea project uses existing buildings to set up air compressor stations, so there is no need to build new air compressor station plants, and it also eliminates the need to put forward conditions for construction and structure majors.

The so-called design conditions are a carrier for various disciplines to convey design requirements to each other.

If the craft profession is compared to the brain of the human body, then other auxiliary professions are equivalent to the functional organs of the human eye, ears, mouth, nose, hands and feet. The condition is equivalent to the neural instructions sent by the brain to various functional organs, and after receiving the instructions, each organ understands what the brain wants them to do and how far to do it.

After Geng Zhiyuan got the flow chart and equipment layout diagram, he began to put forward a condition for each specialty.

In the primary condition, the general drawing major needs to provide equipment layout diagrams, the electrical major needs to provide electrical equipment condition table and equipment layout diagram, the instrument major needs to provide instrument condition table and flow chart, and the HVAC major needs to provide heating and ventilation requirements and equipment layout diagram. And so on, you need to prepare a large number of condition tables and condition diagrams.

Geng Zhiyuan was the first time to put forward the conditions, so he naturally asked Xia Su and other old comrades if he couldn't do it or was not sure. Stumbling and stumbling, it took a week, Geng Zhiyuan finally put forward a condition, and after Xia Su checked and Lin Yin audited, it began to be passed to the corresponding designers of each major on the day before the Lantern Festival.

Other majors successfully accepted the conditions, the electrical designer of the air compressor station was Gao Chenglin, he took the conditions handed to him by Geng Zhiyuan and glanced at it, and threw it on Geng Zhiyuan's face with a snap: "What conditions are you mentioning? I can't accept it!"

There is a saying that first-class people have the ability and no temper, the second-class people have the ability and temper, the third-class people have no ability and no temper, and the fourth-class people have no ability and temper. Geng Zhiyuan entered the design institute not long ago, and he had neither the ability nor the temper. And this Gao Chenglin, even if he has some ability, his temper is not ordinary.

"Senior engineer, where is this condition wrong, can you tell me about it?" Geng Zhiyuan didn't dare to provoke the young old comrades, so he couldn't help but ask in a good voice.

Gao Chenglin snorted and said, "You still want me to point out the conditions you put forward yourself? Go back and see for yourself!"

Geng Zhiyuan saw that he didn't eat oil and salt, so he had to take the condition sheet back to the office and check it again, but he still didn't understand what Gao Chenglin thought he was wrong about.

As soon as he told Xia Su about the matter, Xia Su shook his head and smiled: "This guy just bullied you just here, nitpicking has nothing to do." You fill in the blank fields on the table with none, or just type ×. See what he says. ”

Geng Zhiyuan corrected them one by one according to what the teacher said, and came to Gao Chenglin with the conditions, and it happened that Xu Hong, the person in charge of the electrical major, came to Gao Chenglin to discuss things, Gao Chenglin was not angry in front of her, and took the conditions with a gloomy face and put him aside.

Geng Zhiyuan saw that he didn't squeak, and he didn't know whether he accepted the conditions, or shook his face coldly to show himself, and was a little hesitant to go or not.

Seeing this, Xu Hong smiled and said, "Xiao Geng, go back, I'll look for you again if there is a problem with the conditions." ”

Geng Zhiyuan was relieved, glanced at Xu Hong gratefully, turned his head and quickly slipped out of the office.

If a unit wants to run smoothly, it needs all departments to work together to avoid unnecessary internal friction. However, the implementation of anything needs to be implemented to specific individuals, and people are all kinds of different, which inevitably produces internal friction such as prevarication caused by some human factors.

Where there are people, there are rivers and lakes, especially the design institute where intellectuals gather, and it is a place where right and wrong are gathered, and internal friction is inevitable.

If you want to make a long-distance call, you can go to the nearby telecom business hall during the day, where there is an IC card phone. In the evening, you can only go to the public telephone point on the street, which is slightly more expensive, and can cost more than a dollar for a minute of long distance.

After the Spring Festival, Geng Zhiyuan was busy with the design of the air compressor station and had little contact with Wei Xiao. Worried that his girlfriend would be emotionally awkward, on the fourteenth night of the first lunar month, Geng Zhiyuan ruthlessly came to the public telephone point of a nearby commissary, picked up the phone and called Wei Xiao.

After Geng Zhiyuan returned to Ningcheng, Luo Yang took the opportunity to harass Wei Xiao every once in a while, although Wei Xiao still ignored him, Wei Guoqing was very enthusiastic and kept him for dinner almost every time.

On the fourteenth night of the first lunar month, after Luo Yang had dinner at Wei's house, he picked up the guitar he brought and said to Wei Xiao: "Xiaoxiao, I haven't sung to you for a long time, I'll sing you a song tonight." ”

Wei Xiao guessed that he wanted to use the song to evoke sweet memories of the past, so that she could change her mind and fall in love with him again, and shook her head with a sneer: "No, I don't want to hear it." With that, he turned and went into his hut and closed the door.

Geng Zhi is far away, and it is an excellent time to save Wei Xiaofang's heart. The opportunity must not be lost, and the loss will not come again, where is Luo Yang willing to let go of such a good opportunity. He stood outside Wei Xiao's house with his guitar on his shoulder, tuned the strings a few times, and sang slowly to himself.

Wei Xiao heard a familiar song outside the house, it was the song "The Outside World" that she never got tired of hearing. Luo Yang used to be the head of the Department of Literature and Art of the Department of Foreign Languages of Teachers College, singing, dancing, guitar, and electronic piano, otherwise he would not easily capture the heart of the newborn goddess Wei Xiao.

The beating melody tugged at the heartstrings, Wei Xiao gradually immersed herself in the music in a trance, and the sweet times of the past flashed in her mind like a slideshow.

After Luo Yang finished singing, seeing that Wei Xiao in the room did not respond at all, he immediately shook his fingers and played Wei Xiao's favorite "Moonlight Serenade" again.

"Moonlight Serenade" used to be Wei Xiao's favorite song. When she was in college, the scene she remembered the most was in the starlight under the moon, she snuggled up to Luo Yang, silently listening to him play the "Moonlight Serenade".

The strings plucked like jade beads on the plate, knocking on Wei Xiao's heart's defense, the music opened the floodgates of emotion, and the sadness of lovesickness was cathartic.

Wei Xiao covered her pretty face, leaned on the pillow and whispered, "Zhiyuan, I miss you...... Why haven't you come back yet......"

Luo Yang keenly caught Wei Xiao's slight reaction, knowing that something big was going to happen, and he played more and more vigorously under the excitement. Seeing Luo Yang leisurely intoxicated with the melody of crying, the phone rang suddenly at an inopportune time.