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Re: Johnson firetube boiler, (biomass)

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Posted by kraig on February 27, 2007 at 21:42:29:

In Reply to: Re: Johnson firetube boiler, (biomass) posted by Rick on February 27, 2007 at 21:13:48:

They are using a gasifier, I don't believe sap will affect it, or will it?: : They are specking out a johnson firetube boiler for the new biomass plant being built this spring.(25,000 lb. hr. boilker) I do not know anything about Johnson boilers or firetubes for that matter, we have all watertube. How will cleaning a firetube boiler be as compared to a watertube? I know it is not much fun crawling into the drums on a watertube boiler.We will be burning the gas from the wood chips so I assume it will be very clean. Is punching the tubes on such a unit difficult? We have an air driven tube cleaner. How about the reliability/durability of the Johnson boiler? any Pros or Cons? Thanks.

: The boiler manufacturer is Johnston and they market scotch marine boilers equipped with stokers for burning solid fuels. If you are burning biomass from wood waste a firetube is not your best bet, depending on the amount of sap in the waste. It will plug up the tubes on a firetube boiler and make it much more difficult to clean than a watertube boiler. A watertube boiler would be a better design but much more expensive.

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