The specific reason has not been confirmed. I put forward the following possibilities.

1. Thermal contact with combustible gas may lead to explosion.

Second, static electricity may cause explosion.

The mixture of different substances will increase the probability of electrostatic electrification effect. According to the cargo loaded on this voyage, it is a mixture, in which o-p-xylene accounts for 81.5% of the total; Ethylbenzene accounts for16.37% of the total; Benzene accounts for 0.01%of the total; Non-aromatic hydrocarbons account for 1.88% of the total. When it comes into contact with air, dust, moisture, oxides and other impurities, and in the process of contact, such as settling, splashing, stirring, etc., the amount of electrostatic electrification effect will increase sharply. Therefore, the probability of electrostatic effect produced by this substance is relatively high. ?

Thirdly, it is possible that the ballast water pump switch, electric lighting switch and junction box on the first floor of the ship are all non-explosion-proof electrical equipment, and these electrical equipment cannot effectively isolate electric sparks. When the boatswain turns off the marine magnetic start switch, an electric spark will occur. The electric spark meets the gas that reaches the explosion limit after accumulating on the first floor, resulting in a flash explosion accident. The direct cause of this accident was that the isolation cabin could not be completely isolated, which made the first floor of the non-dangerous area become a dangerous area, which eventually led to the accident.

On April 20th, a ship explosion occurred in Weihai, Shandong Province. The reporter saw at the scene that the ship was braving thick smoke, rescue was in progress, and fire engines kept entering the scene. According to the report of Shandong Weihai Economic Development Zone, it sailed from Weihai to Dalian at 22: 07 on April 19. Is China rich and strong? The passenger and cargo ro-ro ship 1 found a truck smoking in the cabin on the way, and then returned to Weihai Port. Relevant departments of Weihai City quickly launched an emergency response to properly evacuate passengers and crew on board. On April 20th, around 1 1: 40, deflagration occurred during the rescue, and there were no casualties at the scene. The on-site disposal work is being carried out rapidly, and the cause of the accident is under investigation.

It is understood that this round was built by Weihai Haida Passenger Transport Co., Ltd., the holding company of Bohai Ferry Group Co., Ltd., and was put into Weihai in September 2020. Dalian route operation, total length 186 meters, * * * three-story vehicle compartment. The cabin of ships and vehicles is equipped with fixed water mist and carbon dioxide dual fire extinguishing system, and the safety guarantee ability meets the requirements of relevant international codes.

This article is organized by Bian Xiao, and the copyright belongs to the original author. (If there is any infringement, please contact me and I will delete it as soon as possible! )