Please tell me how to prevent the hotel kitchen flue fire.

In recent years, some hotels, restaurants, shopping malls and supermarkets at home and abroad have not cleaned the oil fume pipes for a long time, which has caused fire accidents from time to time, and some have caused huge casualties and property losses. The fire in Paraguay's super-large supermarket, which shocked China and foreign countries, was caused by dust and dirt blocking the corner of the chimney of the barbecue oven in the dining area, which overheated the temperature in the chimney and led to dust explosion between the ceiling and the roof. This paper will briefly analyze the causes of flue fire and seek preventive countermeasures.

First, the cause analysis of flue fire

From the material point of view, the chimneys and smoke exhaust pipes in the kitchens of hotels, restaurants and large shopping malls and supermarkets are usually made of iron or plexiglass. These materials are nonflammable and there is no fire hazard. However, in order to cool and insulate, some hotels and restaurants wrap a layer of combustible materials in these non-combustible materials pipes, which brings fire danger. In order to save costs, some small restaurants use composite plates as chimneys and lampblack pipes. These materials are combustible by themselves. Once the flame goes up or the oil pan catches fire, it may be directly ignited, which is even more dangerous.

Grease is the main factor causing flue fire. Because of the viscosity of oil fume, it can adhere to the inner wall of chimney and smoke exhaust pipeline to form oil dirt, especially where the pipeline has bends, which is easier to adhere and accumulate. If you don't clean it for a long time, grease will accumulate thicker and thicker, blocking the pipeline. Grease itself is combustible, which will burn when exposed to open fire or high temperature, and spread along the inner wall of the pipeline, leading to the expansion of the fire; After the oil dirt blocks the passage, the oil fume can not be discharged in time, which will cause the temperature in the chimney and the oil fume extraction pipeline to be too high, which will cause the oil dirt to spontaneously ignite or the combustible outer packaging material of the pipeline to burn, thus causing a fire.

In addition, some hotel kitchen operators have poor fire safety awareness and a weak sense of responsibility, and leave their posts without stopping the fire, gas, oil or cooking. In case of fire, the flame can easily spread through chimneys and oil smoke pipes.

Second, the flue fire prevention measures

Hotels and restaurants with hotel kitchens should first pay attention to the layout of chimneys and smoke exhaust pipes, and should not pass through flammable decoration materials; Chimneys and smoke exhaust pipes shall be made of incombustible materials themselves, and combustible materials shall not be purchased.

Secondly, the oil fume hood should be scrubbed once a day after use to remove the oil dirt of the day; It should be thoroughly cleaned once every quarter, and the grease and other dirt attached and accumulated in it should be removed in time to prevent excessive accumulation of grease and dirt on the inner wall or bend of flue and oil smoke extraction pipeline from causing fire danger.

Third, improve the hotel kitchen fire facilities and equipment, complete fire alarm equipment, and monitor and alarm the fire in time; Add a gas fire extinguisher, so that gas can be injected into the flue to extinguish the fire at the early stage of the fire; Open nozzles are arranged at the ends of chimneys and smoke exhaust pipes. Once there is a fire in the flue, turn on the sprinkler immediately to prevent the fire from spreading.

Fourth, the hotel kitchen operators are often educated on fire safety knowledge, and the management system of using fire, electricity, gas and oil in the hotel kitchen is formulated, and the operation methods and procedures are standardized to prevent fires caused by human negligence. At the same time, strengthen the implementation of the duty system for key parts, and minimize the probability of fire accidents caused by inadequate cleaning of lampblack pipes.

The fire department also warned that the oil smoke pipeline is particularly prone to fire in summer. Major hotels should remember to clean the oil fume pipes in time to prevent accidents.