How can chemical manufacturing companies ensure safe production?
The key to ensuring safe production in chemical manufacturing companies lies in building a systematic prevention and control system that integrates “human, machine, material, law, and environment”. In order to effectively prevent major accidents such as fires and explosions, efforts must be made from the three aspects of source control, process management, and emergency response to address static electricity hazards.
What you are concerned about is the core pain point of enterprise safety - static electricity may seem small, but it is often the “last stick” that triggers disasters. Especially in chemical scenarios involving flammable liquids and powder operations, electrostatic prevention and control are the lifeline of safe production. Based on the latest industry practices and standard requirements (such as GB 12158-2024 “General Requirements for Preventing Electrostatic Accidents”), the following is a systematic solution:
1、 Strengthening intrinsic safety design: reducing risks from the source
Optimize process and equipment selection
Prioritize using bottom feeding method to fill flammable liquids and avoid static electricity generated by top splashing.
Control flow rate: The initial flow rate of the top oil inlet is ≤ 1m/s, and after immersion, it does not exceed 4.5m/s; The gas velocity for powder transportation should be below the safety threshold.
Use conductive materials such as anti-static belts, dissipative conveyor belts, metal hoses, etc. to reduce friction and electrification.
Improve the electrostatic discharge system
Reliable grounding: All metal equipment, pipelines, and storage tanks must be independently grounded and must not be connected in series. The grounding resistance should be ≤ 100 Ω and regularly tested.
Flange jumper: When the resistance between each pair of flanges exceeds 0.03 Ω, copper jumper wires must be installed.
Installation of static eliminators: Ionic static eliminators are installed in high-risk areas such as material conveying outlets, loading and unloading platforms, and powder inlets to actively neutralize charges.
Enhance automation and monitoring capabilities
Enterprises involved in the “two key points and one major” need to be equipped with a basic process control system (BPCS), a combustible and toxic gas alarm system, and connected to a risk monitoring and early warning platform.
Promote personnel positioning and special operation approval system to achieve full process control of high-risk operations such as hot work and confined spaces.
2、 Standardized operations and personnel management: building the last line of defense
Strict personnel protection
Before entering the explosion hazardous area, it is necessary to touch the static discharge ball or handrail to release human static electricity.
Wear anti-static clothing and shoes, and it is strictly prohibited to wear or take off clothes on the post. The ground should be made of conductive materials.
Implement operating procedures
It is prohibited to use plastic buckets and funnels to contain flammable liquids, and metal containers must be bridged and grounded.
Before extracting and transferring materials, confirm that the static grounding clamp is connected. After loading and unloading, let it stand for a specified time before dismantling (such as for light oil products, let it stand for more than 30 seconds).
Strengthen training and identification management
Regularly conduct specialized anti-static training, covering the principles of static electricity generation, hazard cases, and emergency response.
Set up clear warning signs in areas sensitive to static electricity, indicating the location of grounding points and protection requirements.
