Posted by DEREK SEWELL on April 24, 2000 at 11:34:26:
In Reply to: Re: silica in process boiler posted by DEREK SEWELL on April 24, 2000 at 11:29:38:
THE PROBLEM WITH SILICA IS THAT IT IS VERY DIFFICULT TO REMOVE IF IT DEPOSITS, WE HAVE SUCESSFULLY CONTROLLED SILICA AND REMOVED OLD DEPOSITS BY HIGH BOILER WATER ALKALINITIES
REGARDS,
DEREK
: We have a process firetube boiler in Mexico with some level of silica in feedwater. I understand silica can present problems if it plates out on tubes. What should we look for in the chemistry to understand how to prevent this. What is the critical boiler ppm level and how do we run surface blow to keep under control. Are there different kinds of silica?