What material should be chosen for a tower with a temperature of around 820 degrees?
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I ran into a tough problem today – the boss wants to build a tower that can withstand temperatures of 820 degrees, and he’s asking me to choose the materials. This is really messing me up. 820 degrees – it’s said that some kind of pyrolysis gas needs to be introduced, but I don’t understand it. I’d appreciate advice from those who are more knowledgeable.
This post was last edited by HSLJHZ on 2015-6-27 at 15:26. The temperature is too high, making it difficult to find suitable materials; let’s check what the heat resistance temperatures are for domestic heat-resistant steels such as 5Cr21Mn9Ni4N, 2Cr22Ni11N, and 1Cr18Ni9Ti Does it meet the requirements? Austenitic heat-resistant steel, oxidation-resistant heat-resistant steel 1CR18NI9TI; heat resistance temperature: 850---1200 degrees.
First, please specify what type of material you need: sheet metal, forgings, or steel pipes?
Could we consider using the combustion heating furnaces used in atmospheric and vacuum distillation processes? Let’s see what material they are made of
You can refer to the material of the furnace tubes in ethylene cracking furnaces
There should be a heat-resistant lining or something inside. The temperature in the pyrolysis furnace chamber is roughly the same, but the pressure inside the furnace is very low; as for the furnace tubes, no need to mention them. It’s better to leave this to a professional
It’s similar to something I’ve worked on before: the steel structure of the equipment is designed to withstand temperatures of 250 degrees, with a triple-layer lining made of materials such as corundum bricks; Incoloy 800 is used at the air intake area to prevent erosion
The tower is supposed to serve functions such as separation and absorption; with a medium temperature of over 800 degrees, these conditions don’t seem right. Before separation, the pyrolysis gas is first quenched to allow its temperature to drop sufficiently before separation takes place. If it is a cracking furnace tube for an inverse application, temperatures of over 800 degrees are not a big deal; the outer wall temperature of the furnace tubes in ethylene cracking units is even higher than that.
The operating conditions are not clear. Additionally, although 820 degrees is required, it’s not necessarily the case that the steel will be in direct contact with the material; high-temperature resistant linings or refractory bricks can be used instead.
The nickel-based alloy steel from Shanghai Baoyu Steel might be usable. But it’s expensive.
:L, there are refractory bricks in there