High speed centrifuge explosion-proof problem has been a hot research topic of many manufacturers, the common use is nitrogen protection, small make up that this is just in the shell of the high speed centrifuge with a nitrogen inlet pipe, a nitrogen outlet pipe, the machine at work, the inner chamber filled with nitrogen. As for whether nitrogen concentration can reach the safe range, there is no quantitative control, so the reliability of nitrogen protection is very poor. An improved nitrogen protection system installed in the line in the design of oxygen detection device and pressure sensor, the operation in the process of high-speed centrifuge inner cavity of the oxygen concentration, quantitative control, control the oxygen content within the scope of security (which guarantee the concentration of oxygen in the machine on the explosion limits of flammable and explosive medium).
USES frequency conversion motor, environmental protection, high-speed centrifuge fluorine-free compressor, automatic locking the door cover and alarm system, a 32-bit ARM microprocessor, wide Angle liquid crystal display (LCD), equipped with CANRS485 interface, realize the computer network with high-speed horizontal spiral centrifuge, has the identification function of the rotor, the 36 sets of program storage integral W2dt display control functions, steps can be separated. In the rotating system, a spring cone set is used to remove the rotor, which has a high degree of repeatability and is convenient to install and remove the rotor, thus improving the one-time and accuracy of the separation process.
When correcting the settling coefficient of the high-speed centrifuge, it is assumed that it is not affected by system changes, but the conditions are as follows: 1. 2. There are no solvent molecules that can combine with large molecules. However, we know that the equations used in the analysis of the supercentrifuge of high-speed centrifuges are all derived by assuming that the experimental system is only two-component, while in the actual experiments, equilibrium ions are added, and the concentration is required to be in the range of 0.01-1.0mol/L, and the concentration of macromolecules is usually in the range of 1.0 * 0.000001-1.0 * 0.0001mon/L. So the concentration of equilibrium ions is 10 times greater than the concentration of large molecules, or even hundreds of times greater. This complex problem is often ignored, because when the concentration of equilibrium ions is greater than 0.05mol/L, no abnormal phenomenon is found, while with 1mol/L NaCl, it must be corrected.
As we know, the three elements of explosion are temperature, fire source and oxygen gas, and the three basic conditions to prevent chemical explosion exist at the same time, which is the basic theory to prevent chemical explosion of combustible substances. In other words, the essence of all the technical measures to prevent chemical explosion of combustible substances is the existence of three basic conditions simultaneously. Where :(1) temperature, for a specific medium, whether liquid or gas phase, the operating temperature of the high-speed centrifuge should be considered in the process design, which mainly depends on the process conditions, here is not detailed analysis; (2) in the design of the high-speed centrifuge, sufficient safety space shall be applied to the moving parts to eliminate the possible mechanical friction and impact. At the same time, the machine shall have measures to eliminate static electricity. For the braking device, not to use mechanical friction braking device, generally adopt the form of electrical energy consumption braking (non-contact braking, the disadvantage is that the braking time to be longer than the contact, especially in the case of a large moment of inertia when the full load is more so). In addition, for the belt, the selection of anti - static. Electrical tape to eliminate or reduce the possibility of static electricity generation; (3) oxygen, which is generally protected by inert gas, is replaced with nitrogen inside the high-speed centrifuge to keep the oxygen concentration within a safe range.
