Transport of liquid yellow phosphorus?
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I would like to ask the experts: can liquid yellow phosphorus be transported using a heat transfer oil pump? The magnetic pump that the customer is using currently isn’t working well at all.
Please provide the medium operating conditions, so that we can determine which type of pump would be more suitable
Medium: Liquid yellow phosphorus. Density: 1.8. Temperature: 180°C to 200°C. Viscosity: Yellow phosphorus liquefies above 50°C; the higher the temperature, the better its fluidity, similar to that of water. Flow rate: 50m/h ； Head: 20m. This pump is used for circulation, moving fluid from a vacuum tank to another vacuum tank; the vertical distance between the tanks and the pump is 6–7m. Previously, the design institute recommended a magnetic pump to the customer, but it broke down after just a few days, preventing the customer from operating their pilot plant. The customer then installed a backup domestic heat transfer oil pump, which worked for four days and three nights without any problems. As a result, the customer now believes that heat transfer oil pumps are more reliable. Yellow phosphorus is a very dangerous substance – it is toxic and can catch fire upon contact with air.
Medium: Liquid yellow phosphorus. Density: 1.8. Temperature: 180°C to 200°C. Viscosity: Yellow phosphorus liquefies above 50°C; the higher the temperature, the better its fluidity, similar to that of water. Flow rate: 50m/h ； Head: 20m. This pump is used for circulation, moving fluid from a vacuum tank to another vacuum tank; the vertical distance between the tanks and the pump is 6–7m. Previously, the design institute recommended a magnetic pump to the customer, but it broke down after just a few days, preventing the customer from operating their pilot plant. The customer then installed a backup domestic heat transfer oil pump, which worked for four days and three nights without any problems. As a result, the customer now believes that heat transfer oil pumps are more reliable. Yellow phosphorus is a very dangerous substance – it is toxic and can catch fire upon contact with air.
During operation, could the temperature of the liquid drop below its melting point (44°C)?
Are you worried about the crystallization issue? No, it has heat tracing.
All that’s needed is to take some special measures regarding the insulation jacket and sealing; in theory, a seal-less pump should be used, and it’s best if it also has a jacket for safety reasons
A magnetic drive with 200 degrees is a good option and can be used; this pump, being a shielded pump, should also work fine
It’s so troublesome – there are impurities in the yellow phosphorus medium, and filters aren’t allowed to be installed; magnetic pumps aren’t very suitable for this purpose.
Magnetic pumps are capable of transporting liquids containing impurity particles; it’s just that yellow phosphorus has a high viscosity. Traditional magnetic pumps rely on the liquid to carry away heat, and the slow flow rate of highly viscous liquids can cause the pump to overheat, potentially damaging the silicon carbide shaft. Also, is there a pressure-boosting device in front of the magnetic pump, and is it used to prevent cavitation?