Sichuan Fire-fighting Fire Extinguishing Exercise of Petrochemical Enterprises in East Sichuan Theater Held in Nanchong

On June 20th , as the sixteenth National Safe Production Month activities were carried out in full swing, Sichuan Province Fire Fighting Corps was established in Nanchong to further enhance the ability of the province's fire-fighting forces to dispose of fires in petrochemical enterprises and enhance emergency commanding decision-making and combat capability. The Jialing District held a grand drill to extinguish and rescue the petrochemical enterprises in the East Sichuan Theater in 2017 . 195 officers and 54 various types of rescue vehicles from Nanchong, Guang'an, Dazhou, Suining 4 detachment participating.

According to the disaster situation, at 9 o'clock on the same day , the oxidation reaction tank in the plant zone of Jiada District, Nanchong City, due to corrosion, caused a leakage of the mixed pulp of xylene and acetic acid, forming a vapor cloud and encountering fire in the air. Source, flash explosion, fire. After receiving the alarm, the Municipal Public Security Fire Fighting Brigade immediately asked the factory staff to evacuation and verify the presence of trapped persons, and initiated the “Preliminary Plan for Disposal of Major Chemical Disasters by the Detachment,” and mobilized the chemical squadron disposal team of the city’s squadrons to attend the “Fourth Level Fire Alarm”. Disposal, reporting to the municipal government, requesting the initiation of the “Prediction Plan for Major Fire Incidents in Nanchong City”, mobilizing related linkage units to assist in the disposal, and reporting the situation to the Corps at the first time. After receiving the dispatch from the command center, the chemical park special service fire station, Zhenjiang Road special service squadron, Shunqing squadron, Gaoping Squadron, Jialing squadron, battle service support group, Suizhong squadron, southern squadron, Xichong squadron, Yingshan squadron, Peng The chemical accident disposal team of the An Squadron and the Yilong Squadron rushed to the scene with 45 fire engines and 150 commanders and soldiers. The full-duty command post of the Nanchong City Fire Brigade was dispatched. After receiving the report, the municipal government immediately mobilized engineering and technical personnel, petrochemical experts and public security, traffic police, 120 , meteorology, environmental protection, safety supervision, water supply, power supply, gas and other emergency forces and engineering machinery, giant key foam factory social security forces. Arrive with the disposal. According to the disaster report, the provincial fire brigade initiated the inter-regional reinforcement plan and mobilized the chemical disposal teams from Suining, Guang'an, and Dazhou Fire Brigade to reinforce.

The drill was based on the emergency response model of “relay command, provincial reinforcements, and three linkages between provinces, cities and counties ( districts ) ”. A total of 10 linkage units were mobilized , with more than 100 personnel and 15 vehicles participating in the exercise . After the first squadron’s forces arrived at the plant area, the vehicles were parked outside the factory area as required. Two reconnaissance teams were sent to the plant site to carry out investigations and inspections. One group was responsible for detecting wind direction and spot detection, and the other group entered the plant DCS control center. Understanding the specific locations of disaster accidents and real-time monitoring conditions laid the foundation for the rapid formation of initial disposal plans and force deployment. At the same time, the alert group took up the cordon, placed a corresponding warning signage, and set up a safety officer. After collecting the first-hand disaster accident data, the full-duty command headquarters asked the plant to take measures to relieve pressure and cool down the process. The special chemical fire station at the chemical park used mobile guns and high-spraying vehicles to cool and cool the on-fire device to prevent the disaster from spreading. Dilute the gas at the site and use the water gun at the plant site to drain the water and cool the neighboring devices. Upon arrival at the site, the full-service command post immediately set up an on-site command center to take over the command, entered the DCS control center, and convened the technical personnel of the plant to obtain the floor plan of the plant, the production process flow chart, and the trend map for the discharge of pollutants. With the arrival of reinforcements and social power, more and more special vehicles and equipment were put into fire fighting and rescue operations. The remote water supply system began to lay water supply pipelines, fire-fighting robots entered the installation area to protect the solvent vapor towers, chemical decontamination vehicles established decontamination stations at the safety exits, and all social linkage units also performed their duties, from traffic, weather, and water supply. Various aspects of power supply provide protection for fire fighting and rescue. After the formation of the surrounding area in the installation area, the headquarters decided to adopt the closed-valve breaking process, the high-expansion foam covering the open channel and the nitrogen injection process according to the site conditions and DCS monitoring.

The situation in the fire field is changing rapidly. As the nitrogen in the plant area is used up, the inertization of nitrogen is ineffective, the reaction of the oxidation reaction device is intensified, the temperature and pressure rise sharply, and there is a risk of explosion. The on-site command promptly issued an evacuation order. At one time, the on-site alarm was loud and the alarm sounded loud and clear. All the combatants quickly evacuated to a safe area and adopted a prone position to protect their safety. On-site lifting of high vehicles, mobile foam guns, mobile water cannons and factory fixed guns continue to cool the device. After the investigation team determined that the pressure in the installation area was stable and there was no danger of explosion, the on-site command decisively ordered that all officers and soldiers return to the position and continue fighting. The headquarters of the Corps Headquarters, Suining, Guang'an, and Dazhou Detachment Chemical Disposal Team also arrived at the scene one after another and put into battle. At the same time, the nitrogen tanker arrived at the scene and began to inject nitrogen into the oxidation reaction device to inactivate the reaction to suppress the reaction. The on-site headquarters combined with DCS control center data analysis, the pressure and temperature of the ignition device gradually reached the normal range, and the timing of fire extinguishing was ripe. The headquarters decided to extinguish the open flame and implement plugging. With the order of the headquarters, all the participating forces launched a total attack on the fire apparatus, and the open fire in the installation area was successfully extinguished. In order to prevent re-ignition, the officers and men continued to cool the water. At this point, the entire exercise ended.

After the drill, the participating leaders witnessed the participating forces and equipment demonstrations and fully affirmed the performance of the participating units. The entire drill showed the characteristics of setting the science of the disaster subject, covering all the elements of the whole process, and setting up the orientation inspection ability.