Yesterday, an explosion and fire broke out in a laboratory on the second floor of Hetian Building, Department of Chemistry, Tsinghua University. The laboratory was in a mess. Beijing News reporter Lu She
The open flame of the experimental building involved jumped out of the window, smoke rose and the outer wall was blackened. The photos were provided by witnesses.
Yesterday morning, around 10, an explosion and fire broke out in a laboratory on the second floor of Hotan Building, Department of Chemistry, Tsinghua University. According to Tsinghua University Guan Wei, a postdoctoral experimenter was found dead at the scene of the accident. The Beijing News reporter learned that this unfortunate postdoctoral fellow named Meng Xiangjian is 32 years old and comes from Xiaoxian County, Anhui Province. He just entered school last June. At 6 o'clock last night, his family had rushed to the school to deal with the follow-up matters.
According to the fire department, there are three houses on fire in * * *, with an area of 80 square meters. Tsinghua University said that after investigation, no other casualties were found at the scene of the accident. After the fire broke out, the teachers and students in the building were evacuated in time and the surrounding people were evacuated. At present, the cause of the fire accident is under investigation.
Scene: The pungent wall was blackened.
At noon yesterday 12 or so, at least four warning lines were erected outside the Hetian Building of the Department of Chemistry of Tsinghua University. The windows in the building have been opened, and the pungent smell can be smelled dozens of meters away.
The explosion laboratory is located in the north of Hotan Building, next to Tsinghua High School. The window of the incident laboratory has been blown up, the glass has been broken, the balcony guardrail has fallen off, and the external walls of the adjacent first, second and third floors have been blackened. Some field investigators have taken photos outside the building to collect evidence. Several environmental monitors installed equipment to measure the concentration of harmful substances.
At about 1 in the afternoon, four workers carried a body wrapped in white cloth onto a black funeral car, and the car drove away from the northwest gate. At the same time, a sand truck drove into the scene, and the driver said that it was requested by the school. Guan Wei, a Tsinghua University, said that the sand was transported because waste water accumulated on the ground on the north side of Hetianlou during the fire fighting. "Considering that there are conventional chemicals in the laboratory, accumulated water may cause harm to the environment. The school will fill the accumulated water with sand first, and ask professional institutions to collect it in the afternoon to prevent the pollution that may be caused by direct access to the sewer. "
At about 4 pm, the reporter entered the Hetian Building where the incident occurred. The laboratory where the explosion occurred was a mess, and there was deep water on the ground. This laboratory is about 50 square meters. Except for the two windows that were blown up, the experimental facilities inside were scattered all over the floor. Cabinets, boxes and ceilings were destroyed and the walls were blackened. In the corridor leading to the laboratory, the accumulated water is also two or three centimeters deep, and fire pipes and experimental equipment are scattered all over the place. The building is dark and full of pungent chemicals, and teachers and students are cleaning up experimental equipment.
After the incident, the Academic Affairs Office of Tsinghua issued a notice to suspend classes, saying that due to an emergency in the Chemistry Museum, all the experimental classes scheduled for Friday afternoon, Saturday and Sunday in the old Chemistry Museum and upstairs in Hotan were suspended.
Narrator: The explosion was dull, and there were many students at the scene.
"The explosion shook the ground at that time." The distance from the incident site 100 meter is Tsinghua High School. A student's parents saw the Tsinghua Chemical Laboratory Building jumping out of the window, with flames and smoke billowing, and they quickly dialed 1 19.
"It's like an iron bucket being smashed to the ground and making a dull sound." At the time of the incident, a chemistry teacher in the building where the explosion occurred said that the explosion was not big. He said that Hotan Building has smoke alarm equipment, which will automatically alarm in case of fire, and fire drills will be held every year. Yesterday, after the fire broke out, the alarm bell of Hotan Building went off until 3 pm.
According to the on-site security guard, after the explosion, the fire became bigger and bigger, and the smoke became thicker and thicker. "The smell is very strong and makes people dizzy." The security guard also said that after the incident, many students were forced to the roof by fire and smoke, and another cleaning staff climbed out of the window. Wei, an official in Tsinghua University, said that after the fire, the teachers and students in the teaching building were evacuated in time, and the surrounding people were also evacuated.
According to the students of chemistry department, the explosion happened in 23 1 laboratory. The laboratory is divided into two areas, one large and one small. There were many students at the time of the incident. "Meng Xiang saw a person alone in a small area," said the chemistry student. Suddenly there was a fire and smoke in the room, and soon the smoke filled the whole house, and the laboratory staff fled the room urgently. "I never thought he was still in there."
■ Ask questions
What caught fire and exploded?
Some media disclosed that the cause of the accident was suspected to be related to the highly flammable chemical tert-butyl lithium. According to public information, tert-butyl lithium is an organic lithium compound and a super base in organic synthesis. It is very flammable and will spontaneously ignite in the air. When stored and used, it must be protected by dry nitrogen.
Yesterday afternoon, regarding the accident caused by tert-butyl lithium, Tsinghua University said that the cause of the accident is still under investigation.
"There are strict regulations on the use and experiment of dangerous chemicals," said a chemistry teacher. The accident was a serious experimental accident. "Such a serious accident has never happened before. There must be a problem. " According to public information, in 2008 and 2009, fires broke out in Tsinghua Yifu Science and Technology Building and Welding Hall respectively. Both accidents were caused by improper operation of personnel during the experiment, and no casualties were caused.
The Regulations on Safety Supervision and Management of Hazardous Chemicals in Tsinghua University shows that the laboratory is responsible for the purchase, use and storage of hazardous chemicals, which should be classified and stored separately, and strictly managed to eliminate potential safety hazards. Teaching and project leaders who use chemical reagents are directly responsible for the safety of using chemical reagents.
Tsinghua University reported that around noon yesterday 12, Haidian Environmental Protection Bureau ended the air monitoring in the upwind and downwind areas around Hetianlou site, and no harmful gas was detected, so the air condition was normal. After the accident, the school immediately launched an emergency plan, cooperated with fire, safety supervision and environmental protection departments to investigate the accident, contacted the families of the victims to deal with the aftermath at the first time, and convened an emergency meeting of the Standing Committee of the Party Committee and all units of the school to arrange safety inspections and do relevant follow-up work.
■ deceased
Usually not in the laboratory, but in the library.
Meng Xiangjian, 1983, from Xiaoxian County, Anhui Province. Graduated from Anhui University in 2005; In 2009, he obtained a master's degree in medicine from East China University of Science and Technology; 20 14 received the doctor of science degree from Nanyang Technological University (Singapore). In June last year, Meng Xiangjian came to the postdoctoral mobile station of Tsinghua University Department of Chemistry.
Yesterday, a classmate who came to the scene to look for Meng Xiangjian said that they had breakfast together in the morning, and Meng Xiangjian told him not to go to the laboratory. At about 1 1, he learned that the chemical building had exploded. "Call him right away, but I can't get in touch with anyone."
I met Mr. Meng and Mr. Fa Xiao, fellow villagers in Anhui, and came to the scene after seeing the news.
"Our father is a colleague and has a good personal relationship." Mr. Meng said that Meng Xiangjian is 32 years old, unmarried and has no girlfriend. Mr. Faxiao Zhang said that Meng Xiangjian studied hard since he was a child, devoted himself to his studies and was very interested in scientific research. He is usually either in the laboratory or in the library.
According to reports, Meng Xiangjian is the eldest in the family, and has a younger brother and sister. "His younger brother is also a doctor, and he works as a teacher in a university in Tianjin." Mr. Meng said that it is not easy for parents to bring up their older brothers and sisters.
At 6 pm, Meng Xiangjian's mother, brother and sister-in-law walked out of Yuanmingyuan subway station, and Meng Mu collapsed. Mr Meng and Mr Zhang helped him to the west gate of Tsinghua, and then he was picked up by the staff in Tsinghua.
Meng Xiangjian's sister-in-law said that 58-year-old Meng Mu raised her son with money from selling eggs one by one. "It's not easy to go out at 5 am and go home at night 10."
She told reporters that the night before the incident, Meng Xiangjian also called to tell her family that she had bought a plane ticket to Nanjing next Monday and was going to a university in Nanjing to sign a work contract.
This edition was written/Beijing News reporter Yang Intern Wang Dan
(The above answers were published on 2015-12-19. Please refer to the actual situation for the current purchase policy. )
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