Steps of boiler pickling are as follows
First of all, start pickling, boiler economizer, filling the inner drum and demineralized water wall.
Then, the ignition operation of the boiler, the boiler when the temperature rises to 170-180F, the boiler flame, thereafter pickling operations. Before pickling, superheater also apply in addition to salt backfilled until the water spilled into the drum up to prevent the acid or acid vapor into superheater damage.
When the acid charge of a boiler, in any case, the boiler should not be fired. Drum and other bleed hole should be opened to discharge the acid and iron reaction of hydrogen, hydrogen has been dissipated before sure to avoid open flames or sparking electrical equipment to prevent hydrogen explosion hazard.
Finally, after acid filling is completed, so that the boiler and economizer immersed in the solution for about 6 hours, and then the acid drained and rinsed with demineralized water superheater. Acid emissions, after the acid drained, operating the boiler feed pump, the capacity of a water economizer of a boiler filled, the water supply shut-off valve to prevent leakage.
