'A METHOD OF HEATING CLEANING SOLVENTS TO ACIDIC RANGE FOR REMOVING MILL SCALE RUST FORMED DURING MANUFACTURING STORAGE AND FABRICATION AND BOILER OPERATIONAL STAGES OF SUB CRITICAL SUPER CRITICAL DRUM TYPE/ONCE THROUGH BOILERS'

摘要

The invention relates to a method of heating cleaning solvents to acidic range for removing mill scale rust formed during manufacturing, storage and fabrication and boiler operational stages of sub critical, super critical, drum type once through boilers, comprising the steps of filling the boiler with only plain demineralized (DM) water; raising the temperature of the water to a desired level by boiler firing; injecting a concentrated inhibited acidic solvent into the boiler; and mixing the solvent in heated DM water by a boiler circulation pump, wherein the solvents include one of HCI, HF, Citric acid, and di ammonium EDTA and wherein the temperature of desired temperature range is between 45°C to 95°C.[IN-KOL-2013-01063A]