Acetylene, commonly known as wind coal or calcium carbide, is one of the smallest alkyne compounds and is mainly used for industrial purposes, especially for welding metals. Acetylene is a colorless, highly flammable gas at room temperature. Pure acetylene is odorless, but industrial acetylene contains hydrogen sulfide, phosphine and other impurities, and has an unpleasant smell of garlic. Slightly soluble in water, soluble in ethanol, acetone, chloroform and benzene. Explosion limit 2.1%~80% (volume ratio).

It is mainly one of the important raw materials for organic synthesis. It is also the raw material of synthetic rubber, synthetic fiber and plastic, and also used for oxyacetylene welding and cutting.

Hazard information

[Combustion and explosion hazard]

It is easy to burn and explode. It can form explosive mixture with air and has a very wide explosion range. It may burn and explode in case of open fire, high heat and oxidant.

[Active reaction]

React violently in contact with oxidants. In contact with fluorine, chlorine, etc., violent chemical reactions will occur. It can form explosive substances with copper, silver, mercury and other compounds.

[Health hazard]

It has weak anesthetic effect, fast recovery from anesthesia, and no aftereffect. Inhalation of high concentration can cause simple asphyxia.

Security precautions

The operators must receive special training, have knowledge and operation ability of fire prevention, explosion prevention, anti-static accident prevention and occupational disease prevention, and strictly abide by the operating procedures.

Operate in a closed manner to avoid leakage, and fully ventilate to prevent acetylene gas from leaking into the air of the workplace. Keep away from kindling and heat sources. Smoking is strictly prohibited in the workplace.

Combustible gas detectors and alarms shall be set in places where acetylene occurs or is synthesized, used or stored, and interlocked with emergency ventilation. Explosion proof ventilation systems and equipment shall be used. The operator shall wear anti-static work clothes, and it is prohibited to wear clothes and spikes that are easy to generate static electricity.

Avoid contact with oxidants, acids and halogens.

Safety warning signs shall be set in production and storage areas. Handle with care to prevent damage to cylinders and accessories. Fire fighting equipment and leakage emergency treatment equipment of corresponding varieties and quantities shall be provided.

Emergency disposal

[First aid measures]

Inhalation: quickly leave the site to a place with fresh air. Keep the respiratory tract unobstructed. If breathing is difficult, give oxygen. If breathing stops, perform artificial respiration immediately. Get medical attention.

[Fire extinguishing method]

Cut off the air supply. If the air source cannot be cut off, it is not allowed to extinguish the flame at the leakage. Spray water to cool the container, and move the container from the fire site to an open place as far as possible.

Extinguishing agent: spray water, foam, carbon dioxide, dry powder.

Scientific prevention

The storage and workplace of acetylene need to install real-time online alarm instruments that can alert workers. With the progress of modern science and technology, the instrument industry has developed an acetylene concentration detection alarm.

The acetylene concentration detection alarm is a kind of acetylene concentration detection alarm with modular design, intelligent sensor detection technology, integral flameproof (d) structure and fixed installation mode. The screen is LCD display. The user can connect with other equipment to achieve the remote data transmission function through the three wire system 4~20mA analog or RS485 digital signal output. It can also be uploaded to the network platform for the computer and mobile phone to view the detection. Once the concentration exceeds the limit, the alarm information will be sent remotely and the user will be informed by phone. It can also be configured as programmable switch output and other modules to link the fan or other equipment, To reduce the ethane concentration in the environment, this alarm provides customized products according to user needs, and also supports functions such as output signal fine adjustment, which is convenient for system networking and maintenance.