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  • Silicone factory fire industry safety once again sounded the alarm

    At 0:50 on the 13th, in the number of fires Yong Wan Road, Jinshan District porch industrial town 58 Shanghai-letter (and profit) Chemical Co., Ltd .. It is understood that fire is a silicone oil depot, larger site smoke, burning fiercely. Currently no casualties, employees and the surrounding eight workers have been evacuated. In the first time the fire department to the scene to fight the blaze. It is reported that the fire workshop area of over 1000 square meters, the plant is mainly used for storage of chemical raw materials silicone oil, 30 tons of fire because the silicone oil combustion caused the accident is still further confirmation.

    As of the day of 14:40, the fire has been controlled. Accident business is engaged in foreign silicone products agents and the products and additives applied research and development and other aspects of the business, involving products include organic silicon, organic fluorine-based and special chemicals. The ultimate cause of the fire is currently in further adjustments, the need to wait for the final confirmation of the findings of the relevant departments on the progress of events to maintain sustained attention.
    About silicone oil
    Fluid is a class of Si-O-Si main chain, side chain organic group having a linear silicone polymer. Widely used in the textile, chemical, mechanical processing, chemical, electrical and electronics, medical and other industries. Usually silicone oil to keep liquid state at room temperature. As the molecular weight increases, the viscosity increases, and therefore the viscosity of the silicone oil is an important physical property indexes.
    At present, the common commercial silicone oils include methyl silicone oil, vinyl silicone oil, phenyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil, polyether-modified silicone oil. Commonly referred to as silicone oil used directly as a product, and silicone oil as raw material or additive, added thickeners, surface active agents, solvents, fillers and the like to improve various properties, through a particular process formulated composite , emulsions, solutions and other products, called silicone secondary processed products.
    Currently engaged in silicone oil and downstream products of nearly 200 companies, most companies generally produce silicone and secondary processed products, but also some companies only process emulsion. Although individual variety and quality of some enterprises has reached the international advanced level, but overall, the low Chinese silicone / latex industry production levels, quality of instability, inadequate investment in research and formulation capability and other issues. Faced with fierce competition in the industry, some companies for safety and environmental protection investment is obviously insufficient attention. The aforesaid factory fire incident to industry safety once again sounded the alarm.
    Enclosure
    Silicone oil production and storage areas, there are some safety issues of concern. Quoted from the silicone forum on the production and use of silicone oil-related products in need of some security issues noted below:
    Packaging and storage of monomer occasion
    Hydrogen-containing monomer low boiling point, so in the summer's hot weather especially during the rainy season, attention to the sun and cooling problems. Since hydrogen-containing monomer encounter severe moisture hydrolysis hydrogen chloride and hydrogen chloride fumes formed hydrolyzate is the most breathtaking of all the monomers and a stimulus that, the processing monomer leakage or exposure circumstances do when sampling and other personnel as protection, it is best to use the full breathing masks, nose and mouth while doing eye protection.
    Packaging monomer is a dilemma, the general all-polypropylene barrel (commonly known as plastic buckets 200L) and drums, for packaging the monomer has very strict requirements, there is not much mentioned. Safety requires two different packaging do not pay attention. Of particular note drum rain moisture, because once pitting caused by moisture due to the leakage of hydrochloric acid hydrolysis of the situation deteriorated rapidly. Therefore, many use drums (especially unfamiliar people) often in order to save space the single layered stack, which is a very serious security risk. So, drum and try to stay out of the transfer of a single-layer stacking escape path to prepare for the event of leakage can be recognized and treated as quickly as possible, otherwise the event leak occurs, the leak is difficult to confirm, will bring unforeseen difficulty to deal with the accident. Iron in the diversion of attention during the gentle (although this is common sense, but the need to emphasize). Plastic bucket relative (just the opposite), the less prone to leaks caused by expansion due to the pitting of continuous disclosure. However, due to the intensity of the problem, jerrycans and must not layered stack. Experienced people know monomer barrels at different temperatures, prepare special seasonal variation serious deformation occurs when placing long-term, although this is generally not cause cracking or distortion leak, but once the layer stack and that the situation will be completely different. In addition there will be long-term placement plastic bucket strength damage permeability, specifically with an uneven surface bulge-like penetration erosion due to specific causes related with plastic buckets of processing and packing. So this happens treatment surface material barrel to be extra careful, site preparation and disclosure of certain protective equipment.
    Hydrogen silicone case prepared
    Solvent-free hydrogen-containing monomer hydrolysis process is relatively safe, process control and product quality control requirements are more important factors, presence of a solvent, of course slightly different, because due to the solvent fires caused by the situation more complicated.
    Hydrogen-containing material handling hydrolysis is silicone oil production to a critical stage, but the security risks are often easily overlooked. Because this is the most vulnerable stage hydrogen evolution, in case of fire was prone to hydrogen flashover, thereby causing the silicone oil, the combustion of hydrogen evolution continue to cause such amplification and spread the fire quickly. In particular, the use of polypropylene pipes and equipment such relatively inexpensive acid material in case of fire is often out of control. Therefore, the author does not deny the reasonableness of specific equipment and materials used, but hope in the use of such materials and equipment, to give special consideration to plan for the fire, such as materials and equipment such as intermediate tanks or pipelines as possible short-term use, but also That once fires occur, so that combustion does not spread rapidly. In addition, low molecular weight volatiles pay particular attention to fire hazards.



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