Filtering before heat exchanger

[Blutooth]

Hi all,

First post on this forum, so I hope I am posting it in the right place. Here goes...

I am designing a system to recover heat from several gas streams coming from an oven. The problem is that most of these streams contain different small particles such as sugar (caramel) and different fats. You can already see the problem when these substances would get in the heat exchanger, I don't want to be scraping out sticky stuff after every hour of operation

I remember that some type of filter exists based on a grid that is heated. The idea is that the sticky stuff we don't want in our heat exchanger is burned to dust in this filter, so that they no longer stick to the heat exchanger.

My problem is that I don't remember the name or manufacturer of these types of filters, my google efforts seem to be worthless as well for the time being.

Does anyone have experience with these types of filters or has a good website where I could find more information?

Thanks in advance!


PS: English is not my mother tongue, my apologies for any spelling mistakes.

 

[macmet]

Could you provide more information on your two streams, such as temperatures, material constraints... etc.

 

[Christine74]

For sticky substances like what you're describing you may need to go with a scraped-surface heat exchanger (rotating or reciprocating).

-Christine

 

[Compositepro]

Another option to consider is a regenerative heat exchanger

http://en.wikipedia.org/wiki/Regenerative_heat_exchanger.

Heat is stored in a gravel bed or pile of bricks and the flow is reversed periodically. These are very forgiving of dirty streams.