On the topic of cleaning phosphorus slag in phosphorus trichloride production.
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Among current phosphorus trichloride production enterprises, cleaning phosphorus slag is the most troublesome thing. It is not only dangerous and polluting, but also affects production capacity and system continuity. Therefore, it would be great if a set of online phosphorus slag removal equipment could be made! I have this idea: In the production process of phosphorus trichloride: 1. Use a pump to continuously pump the material liquid in the chlorination kettle into a filter, so that the phosphorus residue is trapped in the filter. When the pressure of the pump becomes too high, switch to another filter. 2. Dispose of phosphorus trichloride, yellow phosphorus, and phosphorus slag in the filter according to the existing methods for cleaning phosphorus slag. In this way, the continuous production of the chlorination kettle can be guaranteed. But there are currently several issues that need to be discussed with you.: 1. If a pump is used to circulate the phosphorus trichloride chlorination mixture liquid, is there such a pump? Is it a good choice? 2. What is the particle size of phosphorus slag? During the chlorination reaction, is the phosphorus slag in a molten state like yellow phosphorus, or is it a solid particle? 3. What is the specific gravity of phosphorus slag? Please provide guidance from experts with relevant experience!
Your idea is unrealistic. In the reactor, the yellow phosphorus is in a molten state. When the pump is used to discharge the material from the reactor, the yellow phosphorus will inevitably be ejected. The measurement of the yellow phosphorus in the reactor will be inaccurate. This will easily cause the reactor to become overchlorinated during production, causing accidents. The processing of the filter tank you mentioned is also more troublesome. It is not as trouble-free as cleaning the kettle, and it will also cause a waste of materials. Please advise if something is inappropriate.
The idea is good, but it is not practical at the current level.
The pump can definitely extract the yellow phosphorus, but after filtering, the yellow phosphorus can also return to the reactor, so it should be said that there will be no shortage of phosphorus in the reactor! What I'm worried about now is whether the phosphorus residue and yellow phosphorus can be separated by filtration. I'd like experts to give me advice!
Reply 4# carlcjb The composition of phosphorus slag is mud or sand, which is either very sticky or very fine, so it cannot be separated from yellow phosphorus by filtration. If the sedimentation method is used, the amount of sediment (or height) in the sedimentation tank cannot be accurately measured. When sending yellow phosphorus into the reactor, there is no guarantee that only yellow phosphorus and phosphorus trichloride will be sent away. If the height of the sediment reaches the pump inlet, during the process of pumping the material, the liquid agitation will mix the sediment with phosphorus trichloride, and its specific gravity should be almost the same as that of yellow phosphorus. (The proportion of mud mixed with sand and water is about 1 or 6, and the mixed slurry of phosphorus trichloride and sand is about 1 or 8.) In this way, the purpose of filtering phosphorus residue cannot be achieved. Furthermore, such a design may not comply with safety regulations, but it also creates more leakage points, making operation more difficult, and the gain outweighs the loss.
The layman doesn't understand the production technology, but I think the yellow phosphorus can be pretreated beforehand.
I think it is feasible and worth a try. A natural sedimentation device can be added to the external circulation. The system is guaranteed to be at 50-80 degrees. Yellow phosphorus will naturally flow back into the kettle, and the phosphorus residue will settle at the bottom and should be cleaned regularly. Of course, it is troublesome to carry out this transformation, but if it is feasible, the problem of slag cleaning can be completely solved. I hope everyone will work hard and share the results. :P
Hello, may I ask what pipe material you use for phosphorus trichloride and what should you pay attention to?