Guangzhou, a dangerous enterprise explosion, the main production of water-based coatings and epoxy, polyester insulation paint

On September 16, 2019, at about 21:30, one of the fire-resistant sections (approximately 40 square meters) of the C1 warehouse of Guangzhou Huigu Engineering Materials Co., Ltd. ("Huigu Company") in Zhongxin Town, Zengcheng City, Guangzhou, exploded, killing two people.
Huigu company mainly produces water-based coatings and mobile phone film, but also produces epoxy insulation paint, acrylic paint, polyester resin insulation paint and other hazardous chemicals, belonging to hazardous chemicals manufacturers.
After preliminary investigation and judgment, the cause of the accident is: the main storage of acrylic resin production agent (the main component is parabens peroxide, organic peroxide, easily decomposed by heat, need to be kept at low temperature, recommended storage temperature of 10-15 degrees C) . Enterprises in the warehouse with explosion-proof refrigerator storage. Before the incident, the refrigerator due to failure to stop cooling time is longer, the temperature in the box rose, beyond the recommended storage temperature, resulting in the trigger by heat decomposition expansion, rise and break the packaging, and flow to the outside of the refrigerator ground. Enterprise organization personnel use cotton yarn to absorb and wipe the leaking agent, improper operation (not in accordance with the chemical safety technical instructions require a large amount of water flushing or inert adsorption agent adsorption), do not rule out the action too large to cause vibration or friction, causing leakage of the trigger flash explosion, and cause a fire. The exact cause is under further investigation.
From the current situation, Huigu company in the safety of production management there are serious problems:
1, the main person in charge of safety responsibility hanging
Huigu company's legal representative (actual controller) is the chairman of the superior company, the general manager is also the director of the superior company, the legal representative and general manager of the main workplace are in the superior company, 1 week only to Huigu company 2-3 days, not in place to grasp the safety production management, the main person in charge of the responsibility hanging, fake hands.
Ii, risk management awareness is weak
the main person in charge of the enterprise is not familiar with the dangerous characteristics of the trigger easily subject to thermal decomposition, do not understand, risk identification and prevention and control measures are not in place. On the grounds of formulation confidentiality, warehouse managers and even safety managers are not aware of what chemicals are stored in the warehouse, what they are used for, much less the main components and hazardous properties of chemicals, and there are significant vulnerabilities in safety management.
Thredi, the storage link violations outstanding
the incident occurred in the warehouse containing triggers about 130 kg (packaging specifications are 20 kg / plastic barrels), in addition to 30 kg in the refrigerator low-temperature storage, there are still nearly 100 kg directly stacked in the warehouse, does not meet the low-temperature preservation requirements.
Se., improper emergency disposal measures
the cause of the risk of leakage is not judged enough, not strictly in accordance with the requirements of the chemical safety technical manual, with a large number of water flushing or inert adsorption agent adsorption, but with cotton yarn absorption and wipe the ground leakage materials, resulting in accidents in the disposal process. At the same time, the accident exposed Guangzhou City, Zengcheng emergency management departments to implement the provincial office on the recent learning of Qingyuan, Zhaoqing, Maoming dangerous chemicals fire accident lessons to inform the spirit is not serious, prevention of accident measures are weak, the main person in charge of the enterprise safety responsibility hanging problem lack of courage to fight;
In the current national province to focus on "risk prevention, safety, welcome Daqing" 100-day key period, less than a week from Guangdong Zhongjun New Materials Technology Co., Ltd. "9.10" explosion fire accident, and Huigu company "9.16" explosion accident, resulting in 2 deaths, but also for many years in Guangdong Province, the field of hazardous chemicals, the largest single accident death toll, the social impact is extremely bad. After the accident, the provincial leadership issued instructions stressed that the current approaching National Day, to strengthen research and analysis, targeted to do a good job in safe production, increase prevention efforts, responsibility, measures put in place. In order to conscientiously implement the spirit of provincial leadership instructions, deeply learn the lessons of accidents, effectively reverse the passive situation of safe production of hazardous chemicals, resolutely prevent and contain accidents, the following work requirements are put forward:
1, resolutely shoulder the major political responsibility for safe production. Safe production is a matter of human life, the current accidents of hazardous chemicals in Guangdong Province are frequent, and the situation of safe production is very serious. All regions should earnestly implement the spirit of the national and provincial safety prevention work conference, soberly recognize the extreme importance of safe production of hazardous chemicals, resolutely shoulder the major political responsibility for safe production, deeply learn the lessons of accidents, with resolute struggle courage and the spirit of not waiting for me, grasp the strength of iron marks, to ensure that all safety production measures are implemented in small detail, effectively prevent dangerous chemical accidents, and resolutely curb the momentum of accidents.
, highlighting the organic peroxide safety special inspection. Organic peroxides are extremely unstable, easily decomposed by heat, and the risk of leakage, explosion and fire is high. All regions should deeply learn the lessons of the "9.10" and Huigu "9.16" accidents, continue to carry out large-scale inspection and rectification of hazardous chemicals in the region, and carry out more detailed and solid implementation of hazardous chemicals enterprises on the basis of the special action of "risk removal and removal" To highlight the safety special inspection involving the production, storage and use of organic peroxides, where there are storage sites (facilities) temperature control measures, storage taboos, storage methods, packaging requirements and other safety management conditions do not meet the requirements of the chemical safety technical instructions, must be immediately ordered to stop production and rectification. Involved in illegal production, illegal operation, illegal operation and other acts, to crack down, the upper limit of punishment, at the same time through the media public exposure, do everything possible to strictly prevent the 100-day period of re-occurrence of dangerous chemical accidents.
, focus on the main responsibility of enterprise safety production. All regions should urge enterprises to earnestly learn the lessons of typical accidents of hazardous chemicals inside and outside the province, firmly establish the red line consciousness and bottom line thinking, and investigate and rectify the safety responsibilities of the main persons in charge of the enterprises in accordance with the law and rectify them within a time limit; Self-examination and self-correction, all-round full coverage to carry out troubleshooting and rectification, serious rectification of all kinds of hidden problems, effective implementation of safety risk control measures, pay close attention to safety management personnel at all levels, practitioners safety production education and training, a comprehensive grasp of the unit's own position involving dangerous chemicals dangerous characteristics, safety risks and emergency measures. All localities should seriously investigate and punish the behavior of enterprises that fail to educate front-line employees, including warehouse managers, on basic safety knowledge and skills.
, strictly and quickly do a good job of accident investigation and disposal. The city of Guangzhou should urge the city to strictly follow the principles of "four not to let go" and "scientific rigour, according to law, implementation of seeking truth from facts and focusing on practical results", organize and carry out the investigation of Huigu company's "September 16" explosion accident, find out the direct and indirect causes of the accident, dig deep into the deep-seated management problems behind the accident, seriously investigate the responsibility of the responsible units and related personnel in accordance with the law, implement effective preventive measures, and strictly prevent similar accidents from happening again. The handling of the accident investigation and handling shall be reported to the provincial office in a timely manner.
are the dangers of leakage of dangerous chemicals that require low temperature storage
First, the increase in temperature increases the volume of hazardous chemicals and increases the pressure
The expansion coefficient of flammable liquid is generally large, stored in an airtight container, the volume is easy to expand after the temperature rises, and the vapor pressure increases, so that the pressure in the container increases. If the pressure in the container exceeds the pressure that the container can withstand, it can cause the container to malfunction or even crack. If the container is open, the liquid expands beyond its capacity and overflows, resulting in running, running, dripping and leaking.
. Second, the temperature increases the evaporation speed of the liquid
the evaporation speed of the flammable liquid is not only related to the characteristics of the liquid itself, but also susceptible to the influence of the surrounding environment, of which the temperature has the greatest impact on it. The higher the temperature, the faster the flammable liquid evaporates, and the greater the vapor concentration on the liquid surface, the greater the likelihood of an explosive mixture with the air and the greater the risk of fire explosion.
3. Temperature rise accelerates oxidation decomposition and self-ignition
due to environmental factors such as temperature and humidity, many hazardous chemicals are easily decomposed after heat, releasing oxygen and even oxygen atoms, oxidizing other substances, while releasing a large amount of heat. If the ventilation is poor, the temperature will increase after the oxidation speed, produce more heat, when the temperature reaches the self-ignition point of the substance will self-ignite fire.
how to ensure safe storage
must have qualified hazardous chemicals warehouses. Hazardous chemicals warehouses should use non-thermal refraction materials as insulation for roofs and walls, eaves should be appropriately lengthened to prevent sunlight from entering the warehouse;
hazardous chemicals should be classified and stored. Hazardous chemicals are generally classified as explosive articles, water-burning articles, self-igniting articles, flammable solids, flammable and gas-assisted gases, corrosive articles, oxidants, etc. These items should be classified, sub-banked, sub-pieces, sub-rack storage, it is strictly prohibited to put all kinds of conflicting nature, fire extinguishing methods are different, easy to cause self-ignition items mixed in one place. When storing items, the stacking shall not be too high, too large, too dense, and the pallets shall maintain a certain distance between the palletizing, walls, roof beams and electric lights, and shall leave fire-fighting passages, and shall not be stored in excessive quantities.
strictly control the temperature. Water storage roofs should be set up for the warehouse or cooling pipes should be set up on the roofs of the warehouses. When the temperature in the warehouse is above 30 degrees Celsius, the spray cools down, keeping the temperature below 28 degrees Celsius. Warehouse roofs, facades and window glass can also be painted white to reduce the absorption of radiant heat. According to the nature of the items and packaging conditions, can also be poured wells on the warehouse floor, ice cubes, conditional air conditioning can be installed to cool down. Some warehouses can open windows in the morning and evening ventilation, put in cold air, close doors and windows at noon, to prevent hot air from entering.
the open-air dumps and storage tanks to cool down. Barrels of flammable liquid should be placed in the building, the need for temporary open storage, the application of non-combustible materials to build a sunshade, sometimes need to spray water to cool down. The flammable liquid contained in the barrel should account for only 90% to 95% of the volume, leaving 5% to 10% of the space, which can prevent the flammable liquid in the barrel from burning or exploding by thermal expansion. The top of the tank should be set up a cooling device, when the temperature reaches more than 30 degrees Celsius, spray cooling. Storage can not be too full, need to set aside 5% to 10% of the volume space.
should have mine protection facilities. Hazardous chemicals warehouses are generally located on the edge of the unit or city, keeping a distance from other surrounding buildings, so that open areas are formed around the warehouse and the warehouse is vulnerable to lightning strikes. Therefore, the warehouse should be installed lightning protection devices to prevent lightning accidents caused by lightning.
strengthen personnel management. Personnel who manage hazardous chemicals warehouses are required to be certified for employment. Warehouse management personnel to regularly inspect the warehouse, find problems to solve in a timely manner, to ensure safety.