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Electric chemical company burn accident

Electric chemical company burn accident

Aug 04, 2020

Electric chemical company burn accident

Two people died and 18 were injured in a burn at a calcium carbide furnace. At present, the company involved has stopped production for rectification, and the person responsible has been brought under control. The specific cause of the accident is under further investigation. At the same time, Shenmu city to the territory of all calcium carbide enterprises and key hazardous enterprises to carry out a comprehensive investigation and rectification.    

It is understood that at the time of the incident, the enterprise 2 calcium carbide furnace in the power failure treatment furnace material surface in the process of hardening occurred in the collapse of the material, resulting in high temperature gas and solid ejected outward. Twenty people at the site suffered burns of varying degrees as they were on shift. All the wounded were sent to the hospital for treatment in the first time, among which 2 died, 8 suffered severe burns and 10 suffered mild to moderate burns. At present, medical experts from Shaanxi province and Yulin city have rushed to hospitals to guide treatment.


"Energy isolation" is so important

Seeing the process of "blackout processing" four words, xiaobian immediately came up with a common word - energy isolation.


Chemical energy isolation plan referred to as "the EIP is accused of manufacturing all hazardous energy sources, such as maintenance area to prevent the production operation, construction, maintenance, maintenance of machinery or equipment or project transformation occurs during may cause personal injury or occupational disease accidental transmission, start, or a sudden release of energy the energy leakage, such as fire or explosion accidents.


The secondary isolation point is a necessary and sufficient energy isolation supplement to the primary isolation point.

For high risk of chemical process piping, equipment disconnected operation, hot work, into a limited space or involved in serious danger of chemicals (including flammable, explosive, toxic, reactivity, high pressure or high temperature and other chemicals) related to the maintenance work, in principle, must want to have a second isolation protection, such as installing a blind plate as a separation point, just rely on the valve and electrical switch for energy isolation is not reliable.

Failure, such as leakage of valves and short circuit of electrical switches, will cause sudden release of residual energy in the process system or sudden rotation of transmission equipment, which will cause injury to personnel in the operation area, damage to equipment and unsafe accidents such as fire and explosion caused by chemical leakage.

The principle of "energy isolation"



For the energy isolation point, the principle of requiring the isolation point to be close to the operation area is required in principle, which is the most likely to ensure the safety of the pipeline and equipment in the operation area and prevent the residual chemicals in the lengthy process pipeline from affecting the operation safety.

According to the content and scope of maintenance or project work and process condition, the personnel in the production area will evaluate the residual energy isolation status and isolation method in the operation area, including process diagram of the operation area, status of valve switch, status of electrical equipment power off, etc.

In a word, energy isolation plan is a systematic method to isolate and control energy sources, from process system energy isolation assessment, cleaning plan, detection method, blind plate installation, electrical partition, Lockout Tagout to the completion of energy isolation plan, and then to the confirmation and verification of energy isolation before work.

Until the end of the maintenance work, the energy isolation point can be removed step by step, and the process system can be restored to ensure that there is no omission, so as to effectively protect the safety of the repair working group personnel, the safety of equipment and property, and the integrity of the process system after maintenance.