D. Steam cleaning temperature (Cleaning shall be performed at the temperature near to the operating temperature considering operating condition of boiler.) E. Cooling down (To remove the scale effectively by temperature change, it is required to perform cleaning and cooling cyclically, having temperature difference as large as possible between cleaning and cooling period.)
Read MoreSteam purity should not be confused with steam quality. Steam quality is a measure of the amount of moisture in the steam. It is expressed as the weight of dry steam in a mixture of steam and water droplets. For example, steam of 99% quality contains 1% liquid water. Carryover is any solid, liquid, or vaporous contaminant that leaves a boiler
Read MoreThe steam blow method is similar to the exhaustive air blow technique, but the boiler is fired to generate the pressurized steam used to clean the steam path. Specialized quick opening valves and a detailed procedure, along with the design of temporary spools, steam quenching devices, silencers, and debris containing equipment are required to perform this service.
Read MoreSteam generation in a pulverized coal-fired boiler is accomplished in a configuration of thermal-steam/water sections, which preheat and evaporate water, and superheat and reheat steam. An example of a coal-fired utility boiler is shown in Fig. 4.4 (the fundamentals of steam production and energy flow were discussed in Chapter 4).
Read MoreThe steam blow method is similar to the exhaustive air blow technique, but the boiler is fired to generate the pressurized steam used to clean the steam path. Specialized quick opening valves and a detailed procedure, along with the design of temporary spools, steam quenching devices, silencers, and debris containing equipment are required to perform this service.
Read MoreSteam purity should not be confused with steam quality. Steam quality is a measure of the amount of moisture in the steam. It is expressed as the weight of dry steam in a mixture of steam and water droplets. For example, steam of 99% quality contains 1% liquid water. Carryover is any solid, liquid, or vaporous contaminant that leaves a boiler
Read MoreSteam Piping Best Practices Introduction Just because it's 'been that way' for a long time, don't assume it's right. In many cases steam systems were designed long before there was any concern about energy efficiency. Systems may have not been installed
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