steam boiler carryover

Steam
DZL series biomass-fired steam boiler

Product thermal capacity:2 – 20t/h
Working pressure:1 - 2.5 MPA

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Hot water
DZL series biomass-fired hot water boiler

Product thermal capacity:1.4 - 14 MW
Working pressure:1.0-1.6 MPA

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Steam
SZL series biomass-fired steam boiler

Product thermal capacity:4-35 t/h
Working pressure:1.0-2.5 MPA

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Hot water
SZL series biomass-fired hot water boiler

Product thermal capacity:2.8-29 MW
Working pressure:1.0-1.25 MPA

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Steam
DHL series biomass-fired steam boiler

Product thermal capacity:20-75 t/h
Working pressure:1.25-5.4 MPA

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Thermal fluid
YLW series biomass-fired thermal fluid heater

Product thermal capacity:1400-29000 KW
Working pressure:0.8-1.0 MPA

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Carry Over From Boiler Drum - brighthubengineering.com

The carryover from boiler drum results in deposits in the internal surface of superheater tubes leading to overheating failures. It also results in deposit in turbine blades which reduces the turbine efficiency. Mechanical carry over take place in a boiler mainly due to drum internals; drum level, foaming and spray water.

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Carryover with steam - Wikipedia

Carryover with steam, in steam technology, refers to transport of moisture and impurities with steam. The moisture carryover with steam is quantified by the mass flow rate of liquid water per mass flow rate of steam. In boilers producing saturated steam, it is typically about 0.1% but may increase with fouling and boiler impurities.

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Steam Monitoring for Carryover Introduction

These two causes of carryover can be controlled through proper monitoring and operation of boiler water chemistry and steam generating equipment. Modern high efficiency steam generators are built with highly efficient steam separation equipment and usually deliver steam purity of exacting standards.

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Chapter 18 - Steam Turbine Deposition, Erosion, and Corrosion

Carryover of boiler water, resulting from inadequate steam-water separation equipment in the boiler, caused this turbine deposit problem. The nature of silica deposits found on turbine blades varies greatly. Table 18-1 lists a number of silica compounds that have been identified in various studies of turbine blade deposition.

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The International Association for the Properties of Water and ...

Carryover from boiler water to steam is a path by which dissolved and suspended solids in boiler water can be introduced into steam. Steam drums are equipped with steam separation devices capable of mechanically reducing the moisture content of the steam. The total carryover into steam consists of two parts: a mechanical part and a vaporous part.

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Foaming and priming in boilers - Lenntech

Priming is the carryover of varying amounts of droplets of water in the steam (foam and mist), which lowers the energy efficiency of the steam and leads to the deposit of salt crystals on the super heaters and in the turbines. Priming may be caused by improper construction of boiler, excessive ratings, or sudden fluctuations in steam demand.

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The Effects of Carryover in Steam Boiler Systems

An often overlooked consequence of boiler water carryover is efficiency loss due to wet steam. Since water at a given pressure has a lower heat content than steam, wet steam has a lower heat content than dry steam. Causes of Carryover. The causes of carryover are generally classified as either mechanical or chemical.

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TECHNIFAX Selective silica carryover - steamforum.com

Most boilers making steam for turbines rarely have excessive carryover of boiler water in the steam. Good operating practices, improved steam separators, and proper chemical control mini-mize this. Silica deposits in turbines, however, can occur even when boiler water carryover is negligible. The reason: steam selectively “picks

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Boiler Carryover - Industrial steam

the fault does not lie with the boiler feed pump. In nearly every instance, we have found excessive boiler carryover to be the culprit. In other words, boiler water is leaving with the steam which results in water requirements exceeding pump capacity. Low pressure boilers are primary offenders although high pressure units are sometimes responsible.

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Boiler Carryover – Cause, Effect and Prevention – Feedwater ...

Mechanisms. Carryover also known as priming is any solid, liquid or vaporous contaminant that leaves a boiler with the steam. In low/medium pressure boilers (<100 bar) entrained boiler water is the most common cause of steam contamination.

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