What will happen if oil is mixed with boiler feed water?
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What will happen if oil is mixed with boiler feed water?
Oil-contaminated boiler feed water may cause the total breakdown of boilers. Engine manufacturers in the maritime industry spend a lot of time and effort in exploring new and better methods in order to reduce consumption and increase efficiency.
How do I know if there is oil in my boiler water?
1. If oil is observed in the hotwell it is recommended to check whether a dark oily film contaminates the boiler water level glasses inside. If so, do not blow down the boiler from the bottom; just surface blow several times. If the boiler is bottom blown, it will become totally covered in oil.
What are the main problems caused by boiler feed water?
When treating boiler feed water (the combination of boiler makeup and condensate return water), several issues can arise that cause boiler scaling, corrosion, fouling, and system failure.
What are the effects of contaminated feed in boilers?
Suspended and dissolved solids in the boiler water tend to deposit in the steam and condensate system. Impurities carried over with the steam cause contamination in the many processes for which steam is used, resulting in overheating, corrosion and reduction of efficiency of the boiler itself and other equipment.
How do you get oil out of boiler water?
The oil will now only cover the boiler in the normal water level range and can be manually removed. Hot or cold water high-pressure jet equipment together with oil dispersive additives would be efficient for removal of the oil.
How does the boiler get contaminated with oil?
The most common sources of oil contamination observed on boilers originate from leaking heating coils fitted in fuel oil tanks, fuel/lub oil heaters, cylinder lub oil from reciprocating steam engines for pumps and heating coils in DB tanks dedicated for sludge/waste oil tanks.
How do you treat boiler water feed?
One of the most common and efficient combination treatments is the hot lime-zeolite process. This involves pretreatment of the water with lime to reduce hardness, alkalinity and in some cases silica, and subsequent treatment with a cation exchange softener.
How do you reduce iron in boiler feed water?
Iron oxide is of particular concern in today’s boiler water treatment programs. Deposition from low (less than 1.0 ppm) hardness boiler feedwater is eliminated with chelant programs and can be reduced by up to 95\% by a good polymer/phosphate treatment program.
How do you remove oxygen from boiler feed water?
Heat is the most common method for removing oxygen. Typical deaeration for smaller boilers utilizes a spray or combination spray and tray system to remove oxygen. The feed water is sprayed into a stream of 5 psig steam for efficient heat transfer and subsequent oxygen removal.
What are the problems expected by using untreated water in a boiler?
Loss of resin from a softener or demineralizer can create problems if the resin escapes into the feedwater. Such resins can melt on the tube surfaces, resulting overheated tubes, etc. Never use untreated water in a boiler. All the water in the deaerator would immediately flash to steam in the event of a rupture.
What should be the TDS of boiler feed water?
ABMA recommended feed water chemistry limits for steam boilers
| Boiler Operating Pressure (psig) (bar) | Total Dissolved Solids – TDS – (ppm) | Total Suspended Solids (ppm) |
|---|---|---|
| 0 – 50 0 – 3.5 | 2500 | |
| 50 – 300 3.5 – 20 | 3500 | 15 |
| 300 – 450 20 – 30 | 3000 | 10 |
| 450 – 600 30 – 40 | 2500 | 8 |
What are the 2 types of boiler feed water treatment?
The treatment of boiler water can be put into two parts. These are internal treatment and external treatment. (Sendelbach, p. 131) The internal treatment is for boiler feed water and external treatment is for make-up feed water and the condensate part of the system.