With the intensifying of market competition, domestic spraying industry production scale expands unceasingly, and powder coating without solvent and less pollution, saving energy and resources, reduce the labor intensity, and the characteristics of the coating of higher mechanical strength, leading to more and more with the process of the enterprise for powder coating industry, but due to the use of dangerous chemicals is more, there is no lack of among them many of the flammable and explosive, and spraying methods mostly adopt electrostatic spraying method, fluidized bed coating method, electrostatic fluidized bed method, electrostatic oscillation method, electrophoresis method and flame spraying method such as high-energy spraying powder method, so in theory, technical requirements on this, At the same time, there are three conditions of ignition source, air and combustible powder, which can easily cause explosion accident in the spraying workshop. The powder spraying accident is characterized by great destructive power, strong suddenness and great damage to human beings. The prevention and supervision of the accident will bring certain challenges to the safety production area.

China's spraying technology basically exists in the first and second industries, especially the manufacturing and construction industries in the second industry, such as machinery manufacturing, materials production and electrical equipment processing. At present, electrostatic spraying is the mainstream method in China. Taking this as an example, powder spraying technology is generally divided into three steps, namely pretreatment, electrostatic spraying and curing. Pre-treatment mainly includes oil removal, rust removal, phosphating (chromating) and passivation, etc. Common pre-treatment includes immersion type, spray type and waterfall type. Electrostatic spraying is the core of this process, which is generally carried out in a fixed electrostatic powder spraying system, which is mainly composed of a powder feeding device, a set or sets of electrostatic spraying guns, control devices, electrostatic generating devices (usually arranged in the electrostatic spraying gun) and a set of powder recycling devices. Solidification is generally carried out in the drying room, by passing the painted workpiece through the high temperature, so as to make the powder concentrate, level, and solidify the sprayed powder onto the surface of the workpiece.

Due to the different economic conditions of each manufacturer, the equipment used in the pretreatment, spraying and solidification production line is of different quality. Some of them buy individual pieces to assemble themselves; Some of them are designed and made by themselves, and the room where the process is built is also different. Even in the same industry, the process of powder size, spraying methods, production capacity, etc. In the process of production, disorderly equipment, if not strictly controlled, will face huge safety risks.

At present our country has set a safe operation for the coating industry regulations "coating operation safety regulations", a total of 12 of this series, powder spraying area for the layout of the powder and have strict requirements, not only the security objectives ofpowder coating industry, also for the future standard basis is provided for the development of the technology, the new starting point for further provide safe production level.

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