Are rotary kilns and roller kilns open-flame devices?

Same request! We also need to install a solid waste treatment system for a rotary kiln

To address this question, it is first necessary to understand a definition: what is a device with an open flame? It is a device in which, during normal operation, there is an open flame in the combustion chamber that is in contact with the atmosphere； If we talk specifically about rotary kilns, I know that there are those that operate with an open flame, those that operate with a semi-open flame, and those that operate with a hidden flame; they are generally used in cement production ； There are also systems that use hot exhaust gas as a heat source for flameless operation; they are used for drying lignite, in rotary kilns, and apparently also for ductile iron. My knowledge isn’t entirely comprehensive. I’ve never worked with roller kilns; they seem to be used for calcination, and they probably operate with an open flame. If such kilns are to be used in a factory building, they must first comply with fire safety regulations

I was previously involved in a solid waste project that used a rotary kiln to treat waste diatomite; at that time, heat was generated from waste thermal gases, and it was a project that didn’t involve any manufacturing facilities

Rotary kilns and roller kilns are classified as open-flame equipment

The explanation is great, especially the definition of that open-flame device! As a supplementary note, one type of rotary kiln I have seen uses electrically heated carbon-silicon rods; it is probably not a device that uses an open flame~

Previously, a company’s rotary kiln was located inside the factory building, but it was used for producing ceramic materials

Yes, actually the key is the heating facility. Both rotary kilns and roller kilns come in flame-heated and non-flame-heated versions.

The length-to-diameter ratio of rotary kilns is generally quite high; you should look up the exact value. I remember it to be 1:17, so please check to confirm this figure. The ease of installation also needs to be taken into consideration – these kilns are usually installed outdoors, and most of them use open-flame combustion. Roller kilns, on the other hand, are also devices that use open flames, but they are typically installed indoors.

It can be placed inside the factory building; many customers simply put it in the workshop. What material do you burn?