Why do cleaning agents frequently cause fire?

In recent years, there have been frequent cases of fires in the use of cleaners by employees in various localities, causing injuries and deaths to users.

April 8, 2018, Electronic Technology Co., Ltd. Ningbo, a fire, resulting in one death. It is understood that when the fire broke out, the company's employees were using spray gun water cleaners.

In the June 28, 2017, a company in Ningbo plant deflagration accident occurred, killing seven employees were injured. It is reported that the day 8:00, the company's production director Hu arrangement 12 employees to clean the workshop, because the night of June 27 supporting the vacuum pump to vacuum coating machines, done diffusion pump maintenance, leading to the shop floor with more oil, Hu Mo arranged for employees to clean the floor with Dajiewang cleaner. Deflagration 8:17:45, sudden vacuum coating plant, resulting in seven different levels of employees are burned.

Throughout the country, such cleanser fires have also occurred frequently.

According to Hong Kong Wen Wei Po reported, April 19, 2011, Aberdeen harbor yesterday morning rare suspect cleaners exploded wounding incident, four FEHD has outsourced workers to clean Jaffe Road, back alleys, it was commonly known as bleach and during " When Koshihika's sodium hydroxide was mixed, violent explosions and pungent gasses were generated. Four people inhaled gas or burned with detergents. One of the female workers became unconscious and the pulse of breathing was stopped for a second time. He was sent to hospital to save his life.

March 18, 2012, Hong Kong Kowloon City Road, a broadcast station FEHD refuse, cleaning lady have suspected mistaken clean water and bleach mix different nature, generate intense chemical reaction caused by the explosion of industrial accidents, women were spilled liquid burns ......

2012 May 26, Guangdong Dongguan Changan town a plastic mold factory cleaners to clean the air compressor with a white oil irregularities causing an explosion, killing seven people were injured, two of them seriously injured.

August 18, 2013, Huiyang District, Huizhou City, Guangdong village of tea in a metal factory workers caused fires with clean water that day workshop floor, 17 people were burned.

October 18, 2014, Guangdong Shenzhen Longhua New Area with the illegal use of mobile phone shell factory floor cleaning white oil caused by exploding, killing three people were killed on the spot and one seriously injured.

What is the spray gun water cleaner? Why frequent fires? Even causing serious casualties?

On April 26th , the firefighting detachment of Ningbo City, Zhejiang Province, conducted a cleanser fire experiment to restore the situation before and after the fire of the spray gun water cleaner.

At the experimental site, three separate brick-concrete rooms with a length of 4 meters and a height of 3 meters were used to test different causes of fire. Each room was restored to the same corporate office scene: a table, a chair, 2-3 dummy, and a cardboard box stacked around the room. The room is also equipped with an experimental monitoring camera, thermometer and combustible gas concentration detector. There is also the main subject of the experiment, a certain brand of spray gun water cleaner.

"There are many kinds of detergents, common are white oil, water, spray gun water, because it has high fat-soluble and high volatility, and strong detergency, often used as a cleaning agent in the industry, but this Types of cleaners are also particularly flammable, and even when they reach a certain concentration, they may be inadvertently flared or explode."

At 10 o'clock in the morning , the detergent fire experiment was officially started.

“The first experiment is what happens when the detergent reaches a certain concentration, and if there is an electric spark, what will happen if the cleaner is used to clean the oil in the room when the machine is simulated or the electric spark is instantaneously generated in the electric circuit switch? In the case of this, it was also the restoration of seven accidents last year ." The staff introduced.

Firefighters opened a bucket of brand new spray gun cleaner and poured 2 liters of detergent into the container. Firefighters wearing fire suits then walked to No. 1 lab, sprinkled 2 liters of detergent on the floor, and restored the factory. The employee cleaned the scene with detergent. After the firefighters finished the cleaning agent, they exited the room and closed the door. At the same time, the staff began timing.

One minute later, Jiang Beifeng, the instructor of the Jiangbei Fire Brigade, issued a firing order, and the staff immediately opened the EDM remote control device in the room until 2 minutes and 11 seconds. He only heard the sound of “boom” and the No. 1 laboratory splattered. The top of the room was lifted. Through monitoring, it can be seen that the clothing of the three dummies in laboratory No. 1 was overdone.

The firefighters who are fully armed and awaiting fire will immediately use a fire extinguisher and a water gun to extinguish the fire and avoid the spread of the disaster.

"According to the monitoring equipment, the concentration of isohexane in Room 1 reached 15.1% at 2 minutes and 11 seconds, " the staff introduced.

Then, the second experiment was officially started.

In laboratory No. 2 , what will be tested is the use of detergents to clean the oil in the same room and what happens during heating of the heating wire.

"The second experiment was mainly to restore what was happening in the room filled with detergent when the machine or other items were heated to a certain degree."

When the firefighters also sprinkled a certain brand of detergent in the experimental room, the heating wire that was energized for only 9.7 seconds ignited the cleaner with a concentration of 1.2% and caused a large area of ​​the room to be overheated.

“It can be seen through experiments that when a certain concentration of detergent volatilizes, when it meets a spark or a high-heat object, it will most likely cause deflagration or even an explosion, resulting in casualties.” Dr. Fire Science State Key Laboratory, Senior Engineer, Ningbo Fire Fighting Team Zhang Xiaoqin "It is understood that only one of the detergent brands in Fenghua District of Ningbo City sold more than 1,600 barrels of detergent last year ."

Zhang Xiaoqin said, “The role of such cleaners is only to clean up oil, but it has huge hidden dangers. The incidents of injury and death are also commonplace. The lessons can be very painful. The reason why we took this risk to do this experiment is to turn to the general public. The masses of the people intuitively demonstrate the fire risk of commonly used spray gun water cleaners, reminding companies that they should not use such cleaners. They should really use them, and they should strictly follow the methods of use, use them in appropriate amounts, and maintain sufficient ventilation at the place of use.”

Zhang Xiaoqin reminded, "In the event of a fire, we should immediately evacuate the fire site and promptly report to the police. We must not covet the property."

This article source: Ningbo fire brigade.