n2h4 normal boiler chemical 2

[jamesbanda]

Dear sirs,

A vendor for our boiler system is proposing we use N2H4 in dilute solution for boiler quality control. We would dilute on site to this level froma 70% to 100% solution. A google search for N2H4 suggests it is hazardous.

So.. I am looking for a boiler expect to tell me there is nothing to worry about this is a normal chemical used in the power generation industry.

or to tell me to post elsewhere.. thanks in advance

 

[abcmex]

Dear Mr. Banda,
you could have a look at the "Boiler and pressure engineering forum". There you may find more information.

Hydrazine is a common chemical in the steam generation and it is definitively a toxic material that requires care and expertice to handle.

http://www.spezialchemikalien.lanxess.de/SC/download/HYHY_e.pdf

http://www.cleartech.ca/msds/levx-06-05-2006.pdf

In earlier times it was very commonly used but the toxiticy (imagine the NFPA diamond is 3-3-3), the existence of other products and the increased understanding and better design of plants have reduced the consumption. In Germany the goverment has prepared a document indicating how not to use hydrazine but is still allowed because there are other applications.

It is a chemical used to protect the boiler and the steam and condensate system. It eliminates the oxygen and reduces the corrosivity of the condensate.

I recommend you to analyze your situation carefully. contact other vendors and evaluate other products like carbohydrazide which may be more expensive but less dangerous to handle. In my opinion modern "state of the art" installations may be operated without hydrazine.

rgs

 

[mxmaciek]

70-100%?!?!
In such concentration hydrazine is used as rocket fuel. Are you sure about your start concentration?
Final, dosed concentration is usually 0.5-1.5% only.
In Europe, bulk delivery is 20% max.

abcmex: use of the organic-based compounds, like DEHA, carbohydrazide is limited by the steam use and pressure. Decomposition of organic compounds makes keeping the specific & cation conductivity in limits simply impossible, due to conductivity caused by CO2, formic and acetic acids created.