Lack of an Operational Confirmation System——Reflection on the Bombing Event of Jilin Petrochemical Double Benzene Plant
The explosion that occurred at the Jilin Petrochemical Shuangfen Plant on November 13, resulting in five deaths, one person missing, over 60 injuries, and the displacement of thousands of residents, has been officially attributed to a critical operational failure. The root cause was identified as negligence during the plant's shutdown process, when a key valve that should have been closed was left open. This oversight led to an abnormally high temperature in the feed system, which eventually caused a rupture and triggered a chain reaction of explosions across multiple pieces of equipment.
It is alarming to realize that a single missed step—failing to close just one valve—could lead to such devastating consequences. As I read about this incident, I couldn’t help but think: what if there had been a second person to verify the operator’s actions? Perhaps this tragedy could have been avoided. However, based on my understanding, such verification systems are rarely implemented in Chinese chemical plants, even those known for their strict safety protocols, like Jilin Petrochemical.
Analyzing past incidents like this one, it becomes clear that many accidents stem from human error—such as incorrect operations, use of faulty equipment, unauthorized access to hazardous areas, or improper handling of flammable and explosive materials. Despite detailed safety regulations in place, compliance is not always guaranteed. Factors like lack of knowledge, fatigue, distraction, or complacency can all contribute to unsafe behavior.
In most chemical plants, operations are typically carried out by a single worker, with no second person to check the work or provide supervision. Over time, repetitive tasks can lead to mental fatigue and reduced attention, increasing the risk of mistakes. These hidden dangers are difficult to detect until it's too late.
Therefore, I strongly believe that all chemical companies should implement an operational confirmation system, especially for high-risk procedures. Each critical step should be verified and signed off by another person. While this may seem inconvenient, it is a highly effective way to ensure that every action is performed correctly and that safety is maintained throughout the production process.
The Plastic Crushing Machine, also known as a plastic granulator or Plastic Shredder, is an industrial device designed to reduce plastic waste into smaller, manageable pieces.
1. Single Shaft Shredder
This type of machine features a single rotating shaft with cutting blades. It is suitable for processing larger, tougher plastic materials like thick-walled pipes, blocks, and pallets. The output particle size can be controlled by the screen mesh size, which typically ranges from 20-26mm for hard materials.
The single shaft shredder provides efficient size reduction and is designed for high output. It is equipped with a high-torque motor to drive the blades, ensuring the necessary force to crush even the toughest plastics.
Application Scenarios: Widely used in plastic recycling plants and manufacturing industries for processing post-consumer and post-industrial plastic waste.
2. Double Shaft Shredder
Equipped with two intermeshing rotating shafts with blades, this machine is designed for heavy-duty applications. It can handle mixed and contaminated plastic waste, offering higher throughput and greater flexibility in processing different types of plastics. The screen mesh size for film materials is usually between 40-50mm.
The double shaft shredder provides powerful crushing capabilities and is suitable for large-scale production scenarios. It features a robust construction and is designed for continuous operation.
Ideal for municipal waste management and plastic product manufacturers, where it helps in processing a wide range of plastic materials.
3. Granulators
Specifically designed for finer grinding and producing uniform granules, granulators are often used in the final stages of the recycling process. They are available in various sizes and capacities to suit different production needs. The machine's inner chamber width can range from 80 to 150 cm, and the motor speed can be adjusted within the range of 400 to 800 RPM.
Granulators produce high-quality recycled plastic granules, which can be reused to manufacture new products. They are equipped with advanced control systems for automated operation, enhancing efficiency and safety.
Used in plastic recycling plants and manufacturing industries for producing high-quality recycled plastic materials. They are also suitable for reprocessing defective products or production waste.
4. Jaw Crushers
Ideal for large, bulky plastic items, jaw crushers use a compressive force to break down the material. They are designed to handle large volumes of plastic waste and reduce them to smaller, more manageable pieces.
Jaw crushers are known for their high crushing force and strong cutting ability. They are equipped with durable blades and a robust frame to withstand the mechanical stresses of crushing operations.
Application Scenarios: Widely used in the recycling and reutilization of waste plastic, jaw crushers help in reducing the volume of plastic waste, making it easier to handle and transport.
Plastic Crusher,plastic crushing machine
Zhangjiagang Polestar Machinery Co.,Ltd , https://www.polestarpm.com