Can a wet-back three-pass steam boiler not be modified with a low-nitrogen burner?
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I have two wet-back three-pass steam boilers here (Hangzhou Fulton RB3000 series, 5-ton steam boilers), powered by natural gas. Currently, NOx emissions are just over 100. In accordance with local specific limit requirements, it must be modified to emit less than 80 mg. I consulted some burner manufacturers, and some said that central combustion boilers cannot be successfully converted to low-nitrogen combustion. Not understanding the principle behind it, I have the following doubts: 1. Is a wet-back three-pass boiler a central combustion boiler? Is the central combustion type a form of burner? 2. Is it possible to carry out low-nitrogen modifications by replacing the burner with a low-nitrogen one? 3. Are there any successful cases? Recommend one for me. Thank you.
Whether it can meet the standards is not determined by the type of boiler. It is necessary to quantify certain parameters.
I’ve seen your previous post. I can give you a few examples: last year, there were many boiler upgrades in the Beijing Military Region, where boilers with capacities over 120 were modified to have capacities under 80, and all of these modifications were approved. This was achieved by replacing the burners. If you need further information, add me on WeChat at 314224598; there are many things that it’s not convenient to discuss here~
A three-pass boiler can achieve 80mg emissions by replacing the burner; you can contact me or send me a private message.
1. The wet-back three-pass system is not central reignition; three passes definitely cannot be considered central reignition, as central reignition can be understood as two and a half passes. It is not possible for the 2nd Center Huiyan to be modified for low nitrogen emissions, as the backfire structure of the center inherently results in a high temperature in the boiler’s furnace, and high temperature is the main factor that leads to the formation of NOx. The three-pass configuration can be changed, especially if the size of the furnace chamber is relatively large during design; it’s easy to make such changes. Generally, for three-pass boilers, as long as the furnace chamber isn’t designed to be too small, replacing it with a low-nitrogen burner will suffice to meet the 80% emission requirements. There are too many such successful cases. 4. For a low nitrogen level of 30, the boiler generally needs to be redesigned.
This document is basically being used as a reference throughout the country