Last week, Nisshin Chemical Co., Ltd. produced 15,000 tons of plasticizer (AMB) production unit and a deflagration accident occurred on December 19, killing 7 people and injuring 4 others.
On the 22nd, the State Administration of Work Safety issued a circular on the accidental explosion of its products, informing that after the preliminary analysis, the direct cause of the accident was that natural gas was strung into the drying system through a newly installed direct combustion heating system and And the air in the drying system to form an explosive mixture of gas in the start-up conditions do not have the natural gas heating system in the event of a source of ignition caused by deflagration. The cause of the accident is under further investigation.
The main technological process of AMB production facility of Rikko Chemical Co., Ltd. is polymerization of styrene, butadiene and methyl methacrylate to form AMB emulsion. The air at about 230 ° C sent from a hot blast stove is used as a drying medium, atomized by a drying tower Of the AMB emulsion dried to obtain the finished product. The production plant stove according to the original design has been using coal as a heating material.
To meet the environmental emission requirements, Ricoh Chemical Co., Ltd. added a set of natural gas direct-fired heating system to the hot-air duct into the drying tower in July 2017, using the burned natural gas tail gas and its air mixture as the drying medium. At about 9:00 on the 19th, the squad leader on duty ordered the natural gas heating system to be put into operation. At about 9:15 am, the squad leader activated the natural gas heating system in the control room and exploded on the periphery of the drying tower and caused a fire.
Founded in December 2003, Shandong Rike Chemical Co., Ltd. is the first listed company in the domestic plastic additives industry and its main products are acrylic impact modifier, PVC processing aid, PVC foam regulator, New PVC impact modifier ACM resin, MBS impact modifier, AMB impact modifier, ASA / PMMA color co-extruded ABS impact modifier and other products, the integrated production capacity of 200,000 tons / year , Is one of the largest suppliers of acrylic modifier in the world
Rikko Chemical '12 • 19 'deflagration accident was another major chemical safety accident following the '12 · 9' major explosion in Lianyungang Juxin Biotechnology Co., Ltd. (causing 10 deaths and 1 wounded).
It is reported that in the first 11 months of 2017, a total of 203 accidents and 238 deaths occurred in the chemical industry in the country. The total number of accidents is still large. Major accidents have not been effectively checked and safety production still has a long way to go.