HAZARDOUS CHEMICAL ACCIDENTS THAT OCCURRED IN SEPTEMBER IN HISTORY

1. Domestic accidents

 Petrochemical

　"9·10" oil tank explosion accident of Zhangwu County Petroleum Company, Liaoning

　On September 10, 1981, an explosion occurred in the No. 1 oil tank of the oil depot of Zhangwu County Petroleum Company in Liaoning Province, killing 6 people. The direct cause of the accident was: when water was poured into the 1# oil tank, the gasoline deposited in the original oil pipeline was injected into the tank with water, so that combustible gas was generated in the tank. The electric welding flame exploded.

　Liaoning Liaoyang Jinhang Petrochemical Co., Ltd. "September 14" explosion accident

　On September 14, 2008, an explosion occurred at Jinhang Petrochemical Co., Ltd. in Dengta City, Liaoyang City, Liaoning Province, resulting in 3 deaths and 2 minor injuries. The direct cause of the accident was: during the process of dropping isooctyl alcohol for the nitration reaction, the on-duty operator was off duty illegally, and the reaction was out of control and failed to be discovered and disposed of in time. This caused the temperature and pressure in the reactor to rise sharply, and the materials in the reactor were removed from the reaction. The discharge port on the top of the kettle sprayed out and sprayed onto the combustibles in the finished product warehouse, causing a fire, causing the barreled isooctyl nitrate accumulated in the finished product warehouse to explode, and causing other materials in the plant to explode and burn.

Fine Chemicals

  "September 28" explosion accident of Hubei Tianmen Chutian Biological Technology Co., Ltd.

On September 28, 2020, an explosion occurred in Tianmen Chutian Biological Technology Co., Ltd., Yuekou Industrial Park, Yuekou Town, Tianmen City, which caused 6 deaths and 1 injury, and a direct economic loss of 5.425 million yuan. The direct cause of the accident was: when Chutian Biological Company used the filter press test machine to filter the dinitroanthraquinone filter material, the filter material flowed under pressure, and it rubbed with the polypropylene fiber filter cloth to generate static electricity and energy accumulation. After reaching the critical value of the electrostatic explosion of the filter material, the filter material is caused to ignite and decompose, and the temperature and pressure in the filter press test machine rise sharply, which leads to the explosion of the dinitroanthraquinone in the filter press test machine.

　　 "September 14" poisoning accident in Zhangye Yaobang Chemical Technology Co., Ltd., Gansu

On September 14, 2020, a large hydrogen sulfide gas poisoning accident occurred in the sewage treatment plant of Zhangye Yaobang Chemical Technology Co., Ltd., located in Yanchi Industrial Park, Gaotai Industrial Park, Gansu, causing 3 deaths and direct economic losses of 4.5 million yuan. The direct cause of the accident was: the staff on duty at the enterprise sewage treatment plant violated the operating procedures and quickly added hydrochloric acid to the No. 6 wastewater tank containing a large amount of sulfide for neutralization, which caused a large amount of hydrogen sulfide gas to quickly overflow in a short time, and the staff on duty was not wearing safety In the case of protective equipment, risk entering dangerous places, inhaling high-concentration hydrogen sulfide and other toxic mixed gases, resulting in personnel poisoning.

The explosion accident of toluene vapor leakage in the "9.2" phosgene chamber of the 805 plant in Gansu

On September 2, 1999, an explosion occurred in the phosgene chamber of the TDI (toluene diisocyanate) production line of China North Industries Group Corporation’s 805 plant, causing 3 deaths, 8 minor injuries and direct economic losses of 48.218 million yuan. The direct cause of the accident was the leakage of toluene vapor in the toluene desorption tower in the phosgene chamber, which filled the phosgene chamber with a mixture of toluene vapor and air that reached the explosive limit. The electrical circuit in the phosgene chamber was short-circuited or the spray of toluene vapor generated static sparks. The explosive gas mixture is ignited, causing an explosion in the phosgene chamber.

The "September 8" explosion accident at an illegal dye intermediate production site in Jinzhou, Hebei

    On September 8, 2016, an explosion occurred in a den of illegal processing of picric acid in Donglizhuang Town, Jinzhou City, Shijiazhuang City, Hebei Province, causing 7 deaths and direct economic losses of approximately 6.1 million yuan. The direct cause of the accident was: the construction personnel violated the hot work regulations, carried out hot work without inspection, safety measures, or approval, and the falling of gas welding spatters caused the picric acid piled up on site to deflagration, which in turn caused The picric acid accumulated in the warehouse exploded.

　"September 14" explosion and fire accident of Liaoning Fushun Shunte Chemical Co., Ltd.

On September 14, 2013, an explosion and fire accident occurred in Fushun Shunte Chemical Co., Ltd. The accident resulted in 5 deaths, two storage tanks were scrapped, 50m3 of methyl formate product burned out, and a direct economic loss of 1.2 million yuan. The direct cause of the accident was: the sparks generated by the workers of the Shunte company during the illegal electric welding operation on the tank top detonated the formic acid (3) methyl formic acid vapor that overflowed from the sampling hole of the tank top and tempered into the tank, resulting in explosive mixing in the tank. Gas explosion.

Zhejiang Huangyan Jiaokeng Chemical Plant "September 17" illegal operation of distillation system explosion accident

On September 17, 1997, an explosion occurred in the distillation system of the methyl ethyl ketone peroxide workshop of the Huangyan Jiaokeng Chemical Plant, causing 3 deaths, 8 injuries and direct economic losses of 501,000 yuan. The direct cause of the accident was that the distillation operator violated the operating rules and did not add stabilizers to the feed liquid before the second distillation started, which caused the overheated decomposition of methyl ethyl ketone peroxide and caused the distillation system to explode.

   Organic Chemicals

"September 13" explosion accident of Jiangwei Hi-Tech Co., Ltd., Leping City, Jiangxi Province

On September 13, 2011, an explosion occurred on the fourth floor of the alcoholysis section of the organic branch of Jiangxi Jiangwei High-tech Co., Ltd., causing 3 deaths, 3 injuries and economic losses of more than 2.3 million yuan. The direct cause of the accident was that the raw materials such as methanol and polyvinyl acetate were not sufficiently stirred and reacted sufficiently. The methanol volatilized in the alcoholysis machine. In order to empty the waste materials that did not react well in the alcoholysis machine, the operator opened the manhole and caused air to enter. Form an explosive mixture of gases. When the operator hooked out the material with an iron hook and cut it with an iron saw, the iron hook, iron saw and the manhole wall of the alcoholysis machine collided with sparks, which ignited the explosive gas mixture and exploded.

Wanhua Chemical Group Co., Ltd. "9·20" MDI buffer tank burst accident

On September 20, 2016, a crude MDI buffer tank with a volume of 12m3 burst at the methylene diphenyl diisocyanate (MDI) production plant in Yantai Industrial Park of Wanhua Chemical Group Co., Ltd., causing 4 deaths and 4 injuries. The direct cause of the accident was that when the system was washed with chlorobenzene during the process of shutting down and returning the material, the hand valve on the outlet pipeline of the diaminodiphenylmethane (DAM) pump was not closed, causing about 8 tons of DAM to enter the MDI buffer. Can. DAM and MDI react to form biuret and polyuret, and at the same time release a large amount of heat. The reaction product blocks the inlet filter of the discharge pump of the buffer tank, causing the liquid level of the accident storage tank to rise to full tank and block the liquid collection pipe and pressure above the tank. Balance tube. The heat released by the reaction caused the temperature in the accident storage tank to continue to rise, causing MDI to self-polymerize and produce a large amount of carbon dioxide. The pressure in the accident storage tank continued to rise, and eventually the overpressure burst.

Liaoning Jinxi Chemical General Plant "9·25" new dichlorobenzene device commissioning explosion accident

On September 25, 1995, an explosion accident occurred during the trial run of a new dichlorobenzene plant at Jinxi Chemical General Plant in Liaoning Province. One person was killed and 12 people were hospitalized for inhalation of chlorine and benzene to varying degrees. The direct cause of the accident was that the catalyst exposed in the gas phase in the chlorination reactor reacted violently with excess chlorine to produce high temperatures and flames, causing an explosion.

 　 Inorganic Chemical

The "9·12" maintenance fire and explosion accident of the chlor-alkali plant in Yangquan, Shanxi

　On September 12, 1997, an explosion occurred in the chlor-alkali plant in Yangquan City, Shanxi Province during maintenance, resulting in 3 deaths. The direct cause of the accident was that the 2# air-cooling system and 3# hydrochloric acid storage tank of the hydrochloric acid synthesis section of the plant leaked, and the hydrochloric acid storage tank was not cleaned, replaced, analyzed, and the relevant regulations for hot work were not implemented. , Sent 4 maintenance workers to repair with plastic welding guns, and an explosion occurred during welding.

　The explosion accident of the "September 20" hydrochloric acid storage tank of Henan Kaifeng Second Chemical Plant

On September 20, 1988, an explosion of a hydrochloric acid storage tank occurred in the second chemical plant in Kaifeng, Henan, causing 3 deaths and 1 serious injury. The direct cause of the accident was that the operator did not go through the hot-fire procedures when welding on the top of the hydrochloric acid storage tank, and there was no exhaust port on the top of the hydrochloric acid storage tank, which caused hydrogen to accumulate on the top and cause an explosion after fire.

　Hunan Luxiang Barium Industry "September 23" overhaul of Raymond machine deflagration accident

On September 23, 2014, a deflagration accident occurred in the barium nitrate packaging workshop of Luxiang Barium Industry Co., Ltd., Xinhuang County, Hunan Province during the inspection and repair of the Raymond machine, resulting in 6 deaths. The direct cause of the accident was: when the Raymond machine was overhauled, the top cover of the bottom gearbox collapsed, forming a half-moon-shaped opening. The barium nitrate left on and around the top cover fell into the gearbox oil, resulting in strong oxidizing barium nitrate. Mixed with organic combustibles (motor oil) to form an explosive mixture, maintenance personnel beat the bolts with iron in violation of regulations to produce sparks, triggering deflagration.

The "September 24" suffocation accident of Hubei Dajiang Chemical Group Co., Ltd.

　At about 16:40 on September 24, 2017, a suffocation accident occurred in the sulfur melting section of the sulfuric acid center of Hubei Dajiang Chemical Group Co., Ltd., resulting in 3 deaths. The direct economic loss was 3.0385 million yuan. The direct cause of the accident was: in the absence of a restricted space operation ticket, no ventilation replacement, no detection and analysis of the air in the tank, and no personal protective measures, the relevant personnel entered the 1# filter aid tank for inspection and repair. During the operation, after finding that someone was suffocating in the tank, the rescue was carried out blindly without wearing personal protective equipment, which led to the expansion of the accident.

　Coal Chemical Industry

　"September 14" poisoning accident of Shanxi Xiaoyi Shanxi Jinmao Energy Technology Co., Ltd.

    On September 14, 2020, a major acute poisoning accident occurred in Shanxi Jinmao Energy Technology Co., Ltd., Xiaoyi Economic Development Zone, which caused 4 deaths and 1 injury, and a direct economic loss of 3.708 million yuan. The direct cause of the accident was: illegal operation and blind rescue. An operator at the VOCs post in the chemical production workshop failed to follow the operating procedures. After the waste liquid from the pickling tower was discharged into the underground tank, the waste liquid in the underground tank was not transferred to the tar ammonia mechanized clarification tank, and the ground was not confirmed. For the pH value of the waste liquid in the tank, directly open the waste acid discharge valve to drain the liquid. The chemical reaction in the underground tank generates a large amount of toxic gas (hydrogen sulfide) and quickly diffuses to the ground, causing it to be poisonous. The other three people who were undergoing maintenance work did not take any protective measures to rescue blindly, which led to the expansion of the accident.

    Ningxia Jiemeifengyou Chemical Co., Ltd. "9·7" poisoning accident

On September 7, 2014, Ningxia Jiemei Fengyou Chemical Co., Ltd. had an accident where an ammonia gas-liquid mixture was sprayed from the top of the main torch tube, causing 41 people within 200 meters of acute ammonia poisoning. The direct cause of the accident was: after the safety valve set on the outlet pipeline of the two ammonia evaporator shell side equipment took off, the liquid ammonia directly entered the ammonia accident flare pipeline, and the ammonia accident flare was not equipped with a gas-liquid separation tank, which caused the liquid ammonia to escape from the accident. The torch spouted out and spread after gasification, leading to accidents.

other

"September 17" chlorine poisoning accident of Yunnan Nanlin Group Electrochemical Co., Ltd.

　On September 17, 2008, a chlorine leak occurred in Yunnan Nanlin Group Electrochemical Co., Ltd. The accident caused 71 people to be poisoned. The direct cause of the accident was: After the operator of the liquid chlorine filling station filled the liquid chlorine cylinder and closed the liquid chlorine filling valve, he did not adjust the liquid chlorine filling main return valve in time, and the short-term pressure of the filling main pipe increased rapidly, causing the charging The gasket on the upper flange of the valve at the root of the system pressure gauge is leaking. The leaked liquid chlorine gasified and diffused, causing the operator and the 6 operators in other positions downwind, as well as the 64 construction workers in the second phase of the company's construction project to be poisoned to varying degrees.

2. Foreign accidents

"9.11" explosion accident at AZF chemical plant in Toulouse, France

On September 21, 2001, an explosion occurred at the AZF chemical plant in Toulouse, an important industrial town in southwestern France. The accident caused 31 deaths and more than 2,500 injuries. According to the investigation, the explosion occurred in warehouse 221 of the AZF factory. At that time, there were 300 tons of ammonium nitrate in the warehouse, which was mixed with 500 kg of sodium dichloroisocyanate (which has strong oxidizing properties and is mainly used as a disinfectant). Local overheating eventually led to a violent explosion.

Tank explosion accident at the ethanol plant in Khon Kaen, Thailand

    On September 12, 2016, an explosion occurred at the Ethanol Power ethanol plant in Non Sila District, Khon Kaen Province, Thailand, killing 3 workers. At the time of the accident, the three workers were overhauling the top cover of a wastewater storage tank in the plant, and welding sparks detonated the combustible gas in the tank. The combustible gas in the tank is methane.

Major explosion accident in Bua area, Madhya Pradesh, India

On September 12, 2015, a large number of colloidal explosives, urea and other chemicals illegally stored in a three-story commercial and residential building in the Buwa area of Madhya Pradesh, India, caused a fatal explosion, causing at least 100 people including 3 children More than 150 people were injured. The building was located near a busy bus station. Part of the building collapsed after the explosion. The explosion affected a nearby flour mill and restaurant.

　　 Hydrofluoric acid tanker explosion accident in Gumi City, South Korea

On September 27, 2012, five employees of Hube Global Chemical Manufacturing Plant in Gumi City, Gyeongsangbuk-do, South Korea used pipes to connect a 20-ton tanker carrying hydrofluoric acid to a hydrofluoric acid storage tank in the factory, and an unexplained explosion occurred. . The explosion caused damage to the connecting pipe of the storage tank, causing about 8 tons of hydrofluoric acid to leak. On the day of the explosion, the leaked hydrofluoric acid spread to a radius of 2 kilometers, and the secondary disaster affected a wider range. The leak caused 5 deaths, 18 injuries, and 1,594 people receiving medical treatment. More than 200 hectares of farmland were affected. About 300 villagers needed temporary resettlement and 3,200 livestock were affected by toxic gases. Affected by this accident, nearly 80 companies stopped production, causing economic losses of approximately 17.7 billion won.

Fire accident at Beba ethylene cracking plant in Germany

On September 28, 1992, a fire broke out at the 440,000-ton ethylene cracker in Beba, Gelsenkirchen, Germany. One technician was killed and 7 people were injured, 4 of whom were seriously injured. The factory was shut down for 3 weeks. The cause of the accident was a failure of a pipeline from the No. 4 cracking unit to the storage tank that transported pyrolysis benzene, causing benzene to leak. Workers nearby called the on-site fire brigade. The fire brigade was preparing to cover the benzene with foam when the benzene was ignited.

Leludwigshafen chemical plant explosion accident in Germany

In September 1921, an explosion accident occurred at the Aoburg chemical plant in Leludwigshafen, Germany, causing 561 deaths and 2,000 injuries. The violent explosion caused serious damage to 80% of the buildings within 25 kilometers and more than 7,500 people. Homeless. The train stopped in the railway station was swept away by a huge shock wave, and the glass of all buildings within a radius of 70 kilometers was shattered. The explosion also blasted a huge crater 125 meters long, 90 meters wide, and 20 meters deep on the ground, which caused a fire, which was controlled after many days of fighting. The direct cause of the accident was that the plant stored a large amount of sulfate and nitrate in the warehouse, and wanted to be listed when the market was booming. When the accident happened, the staff tried to use explosives to loosen 4,500 tons of solidified ammonium nitrate and ammonium sulfate.