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New regulations have been implemented! Fine chemical safety is upgraded again, and centrifuges are forced to install oxygen content analyzers
Date: 2025-11-28Read: 4
Recently, the mandatory safety standard "Safety Management Specification for Fine Chemical Enterprises" was released（AQ 3062-2025）Will be2025year10moon18Daily implementation.This is not simply "installing more instruments", but a crucial "strengthening foundation" for intrinsic safety in the industry after deeply learning from the lessons of accidents.
When the centrifuge is running at high speed, the internal scraper and material friction will generate electrostatic sparks, and fine chemical production often involves flammable and explosive solvents such as toluene and n-heptane. Once these solvents leak and mix with air to form an explosive mixture, and encounter electrostatic sparks, serious accidents such as explosions and fires are imminent.
At around 20:00 on September 13, 2024, a heartbreaking accident occurred in the workshop of a pharmaceutical company in Anhui. The employee opened the manual valve to add materials while the nitrogen protection tube of the centrifuge was not connected. Due to the non use of nitrogen protection, the flammable liquid inside the centrifuge vaporized and mixed with air to reach the explosive limit, causing a flash explosion when encountering static sparks and resulting in a safety accident.
Mandatory requirement:The new regulations explicitly require that centrifuges using flammable and explosive solvents (such as alcohols, ethers, esters, ketones, alkanes, aromatics, etc.) in the production process of fine chemicals must be installedOnline oxygen content analyzer.
Core objective:Prevent the formation of explosive gas environments (mixtures of flammable gases/vapors and air/oxygen) inside the centrifuge.
lThe centrifugal separation process often involves the volatilization of flammable and explosive solvents.
lThe centrifuge chamber is a relatively enclosed space, and the solvent vapor emitted is prone to accumulate.
lIf the oxygen content reaches a certain level (usually near the lower explosive limit), it is highly prone to explosion or fire when encountering ignition sources (such as electrostatic sparks, mechanical friction sparks, electrical sparks, etc.).
Intrinsic safety enhancement:This is from the perspective of intrinsic safety of the process, throughActive monitoring and controlKey parameter (oxygen concentration) to eliminate explosion conditions.
The introduction of new regulations has posed new challenges to enterprises, but many fine chemical companies have actively responded and quickly taken action to put the installation of oxygen analyzers on the agenda, safeguarding safety production with practical actions.
Carbon steel version
Stainless Steel VersionThe gas analysis preprocessing system processes the measured gas by filtering out impurities, removing water, and dividing the flow. Finally, the stable, dry, and clean sample gas is sent to the gas analysis instrument. It is an integrated system for pre-treatment of gases that are subject to high temperature, high pressure, normal pressure, negative pressure, as well as complex influences such as acidic gases, moisture, polymerization reactions, heavy oil, particles, etc. on site.
Gas detection:oxygen
Range:0~5%/10%/20%/25%/30%VOL
Output signal:4-20mA、RS485
According to the on-site operating conditions of the centrifuge, the centrifuge123placesequencesampling
The sample gas arrives at the analyzer and undergoes pre-treatment to remove oil, water, dust, etc. from the sample gas, ultimately obtaining a clean, pure, and constant flow sample gas for detecting the oxygen content in the sample gas.
Before starting the centrifuge, the staff manually introduces a large amount of nitrogen to replace the oxygen in the centrifuge. Reduce the oxygen content to4%VOLThe centrifuge can only be started and operated normally. In the explosion-proof control system, there is always a small flow of nitrogen gas flowing into the centrifuge to ensure a slight positive pressure and prevent air from entering. When the oxygen content of the centrifuge exceeds4%VOLless than8%VOLThe explosion-proof control system will automatically turn on a large flow of nitrogen to inject a large amount of nitrogen into the centrifuge, reducing the oxygen content. If the oxygen content does not decrease but instead increases, when the oxygen content is greater than8%VOLAt that time, the explosion-proof interlock control system will send a switch signal to the centrifuge power control box to stop the centrifuge from working. The first level alarm for oxygen content is set to4%VOLThe second level alarm is set to8%VOL,Customers can also adjust the price downwards or upwards according to the timing
Instrument explosion-proof certification, explosion-proof level:Ex db IIC T6 Gb；Ex tb IIIC T80℃ Db(Dual explosion-proof certification for dust and gas environment) Protection level:IP66.
The implementation of the new regulations is not only an upgrade of equipment, but also a sublimation of safety concepts. Embracing change and implementing science, the safety barrier of the fine chemical industry will become even more unbreakable! Safety is always the red line that cannot be crossed in production, and it is also a worthwhile investment for enterprises!
Take action to equip centrifuges with the 'safety eye' and jointly safeguard our production safety!