Steam boilers

Boiler tubes are damaged by pitting corrosion

• Dosing of oxygen scavenger is insufficient
• Low temperature in feedwater tank - thermic deaeration does not work well
• Oxygen scavenger is inconvenient for the system
• Oxygen scavenger is already old
• Aerated or non-functional dosing of chemicals
• Pulse watermeter does not work. Dosing pump is connected to it.
• Control unit of dosing to system is fault

Boiler tubes are scaled, fair colour

• Ion-exchanger (Reverse osmosis) does not work
• Quality of condensate is low and parameters of boiler feed water worsens
• Condensate can be worsen either resprays or it is polluted during road by damaged interchanger from which condensate receives raw water, or other substance from production
• Low or zero concentration of phosphates or another scale inhibitor or isn´t dosed at all
• Inconvenient scale inhibitor is used for this type of boiler water
• Aerated or non-functional dosing of chemicals
• Pulse water meter does not work. Dosing pump is connected to it.

• Control unit of dosing to system is fault

Boiler is full of sludges, colour is red

• Probably to many phosphates is dosed into boiler feed water
• Condensate worsens quality of boiler feed water. Hardness comes to system and and it leads to phosphates sludge creation.

• Boiler water is thickening or blow-down is too low and sludge stay in boiler

• Operation of blow-down does not work sufficiently or automatic blow-down is set up badly
• Control unit of dosing to system is fault

Boiler after half-year polymeric continual cleaning, sludge is almost gone and it stays only protective phosphate layer

Boiler carryover

• Blow-down is too low
• Bad quality of condensate can be caused by carryover. Another problem is increasing risk of clogging boiler thanks to shoddy boiler feed water althoughion-exchanger in supplemental water works well
• Increasing fuel consumption of boiler as a result of shoddy boiler feed water and thereby low cycles of concentration in boiler water
• Boiler water is thickening or blow-down is too low and sludges stay in boiler
• Operation of blow-down does not work sufficiently or automatic blow-down is set up badly
• Pulse water meter does not work. Dosing pump is connected to it
• Control unit of dosing to system is fault

Condensate is yellow colored , red or contains black sediments

• Condensate pipeline is affected by corrosion
• Except food production system should be treated by volatile amines
• Chemicals for protection of condensate pipeline increase condesate´s pH around 9 also they passivate an iron surface and create protective layer