What resin is best for use in reverse thrust nozzles?
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For a first-stage power wave reverse nozzle with an inlet temperature of 320, what resin is the best to use?
It’s still resin, or vinyl resin; graphite bricks need to be used as lining inside, otherwise no resin can withstand 320 degrees.
Derkant 470 phenolic vinyl resin has a temperature resistance of around 125°C.
It resists corrosion by dilute acids; we use PO lining for the overflow weir, and steel-lined PO as well below. Resin can be used for the nozzles, while Hastelloy is used for the screws
We use PTFE resin! ~~~~
The overflow weir and transition section are made of lead, the reverse nozzle is made of epoxy resin, while the nozzle features a steel lining combined with PTFE.
In the past, reverse nozzles were not lined with graphite bricks; the liquid curtain created by the overflow weir was used primarily to protect them from damage caused by high temperatures, as in Jinlong Phase I and Phase II, as well as Guixi； Later, some equipment manufacturers proposed an innovation – lining with graphite bricks – but transition sections and spillways were still required.
Add a economizer to the inlet pipe, which can extend the service life of the power wave.