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Prevent explosions during transfer of powders into flammable solvents
Historically, operations where powders are transferred into reactors have resulted most conspicuously in fires and explosions. The risks are increased significantly where flammable solvents are also present within the procerss. A large proportion of such operations are still carried out manually, thus explosing the personnel involved to immense safety risks. Either in the presence or absence of flammable gases or vapors, the minimum ignition energy (MIE) of the powder and the method of transfer can create the risk of an explosion. In order to increase the safety of these processes, transfer of powders should be carried out in closed systems, the recipient vessel should be inerted, every precaution should be taken during and after the transfer to maintain the lowest possible oxygen concentration within the reactor, and the systems should be separated by a physical barrier. Most gravity-based transfer systems offer poor levels of safety overall, and risks are further compounded by the nature of the material being transferred and the process conditions. This is true to such an extent that an operation that is considered safe under one set of parameters can be destabilized by changing one small aspect of the system. A system that does not use gravity, eliminates oxygen from the powder, and has a physical barrier between itself and the reactor during loading can provide a safe solution for powder transfer independent of the nature of the powder and the process parameters. The importance of process optimization in conjunction with ever changing safety and quality criteria means that in order for manufacturers to effectively function in a competitive marketplace, the process technology they choose to apply must be flexible, and guarantee full safety of their personnel, product and equiupment regardless of the process parameters and powder characteristics.
Prevent explosions during transfer of powders into flammable solvents
Historically, operations where powders are transferred into reactors have resulted most conspicuously in fires and explosions. The risks are increased significantly where flammable solvents are also present within the procerss. A large proportion of such operations are still carried out manually, thus explosing the personnel involved to immense safety risks. Either in the presence or absence of flammable gases or vapors, the minimum ignition energy (MIE) of the powder and the method of transfer can create the risk of an explosion. In order to increase the safety of these processes, transfer of powders should be carried out in closed systems, the recipient vessel should be inerted, every precaution should be taken during and after the transfer to maintain the lowest possible oxygen concentration within the reactor, and the systems should be separated by a physical barrier. Most gravity-based transfer systems offer poor levels of safety overall, and risks are further compounded by the nature of the material being transferred and the process conditions. This is true to such an extent that an operation that is considered safe under one set of parameters can be destabilized by changing one small aspect of the system. A system that does not use gravity, eliminates oxygen from the powder, and has a physical barrier between itself and the reactor during loading can provide a safe solution for powder transfer independent of the nature of the powder and the process parameters. The importance of process optimization in conjunction with ever changing safety and quality criteria means that in order for manufacturers to effectively function in a competitive marketplace, the process technology they choose to apply must be flexible, and guarantee full safety of their personnel, product and equiupment regardless of the process parameters and powder characteristics.
Prevent explosions during transfer of powders into flammable solvents
Explosionsschutz während der Förderung von Pulvern in entflammbare Lösungsmittel
Glor, Martin (author)
Chemical Engineering, New York ; 114 ; 88-95
2007
8 Seiten, 9 Bilder, 1 Tabelle
Article (Journal)
English
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