Reasons for biomass boiler slagging
The slagging of biomass boilers refers to the ash produced in the burning of biomass fuel. At heat, the ash remains in fluid or soft strong condition. Once they touch the heating surface area, they would certainly abide by it and develop right into slag.
Biomass fuel make-up and environmental tool
The ash melting point is impacted by the composition of biomass gas and also ecological medium. If there are incompletely combusted fuels, rice husk pellet machine will make the ecological medium weakly reductive, and reduced the melting point. Under this condition, the ash are very easy to connect to the hearth and also the wall of superheater. If the biomass fuel has high moisture content, the steam will certainly soften potassium, which is the significant material in ash.
Pollutants in biomass gas create slagging
A big part of biomass gas are made by more than 1 raw material. In some cases they are blended with dust as well as sand. These impurities altered the composition as well as melting temperature of biomass gas. With high ash as well as alkali steel web content, these impure biomass gas are easier to trigger slagging.
Not enough air in boilers for burning
Occasionally the biomass fuels are dispersed erratically in central heating boilers. They come to be heat combustion mass as well as melt with inadequate oxygen, which will certainly trigger slagging. Insufficient air flow amount will enhance the slagging degree. As a result, to prevent biomass boiler slagging, you ought to regulate the proportion of fuel and also air.
You can adjust the air percentage by removing some gas. Besides, slagging may arise from boiler troubles. The feeding tool can trigger fuel stacking as well as worsen slagging.
Uneven warmth distribution of central heating boiler surface area
The central heating boiler inside temperature level as well as warm distribution have excellent influence on the slagging. As biomass pellet machine , slagging generally appears in flue and also superheater surface. When the liquid or soft solid ash approach the heating surface, it don't have adequate time to cool, so it is easy to abide by the heating surface area as well as gather. As looks into proved, the higher the boiler temperature, the more slagging. Slagging impact the heat exchange of central heating boiler surface area, block the flue, boost the smoke circulation rate, and also exacerbate the home heating surface area wear.
How to address the slagging of biomass boilers?
Now we know the slagging of biomass central heating boilers develops from the biomass fuel residential or commercial properties and also central heating boiler design. To minimize the slagging, we need to select excellent quality biomass pellets and also high-efficiency central heating boilers, and also control the feeding rate. But you can't eliminate slagging completely. You need to clean the biomass central heating boilers regularly.
Heavy steam residue blower
Traditionally, they make use of steam soot blower to eliminate slagging in boilers, but the cleansing effect is hardly sufficient. They have to wash the boiler with high-pressure water.
The potassium in biomass fuel produce silicon in burning and reduced the softening temperature to 800 ℃, which is in the range of superheater. So the soften ash is easy to connect to the heat wall surface as well as tough to be removed by heavy steam residue blower
Besides, vapor soot blowers has complying with negative aspects. The boilers cleaned by vapor soot blower have to wait on 15 days for next use. The removing area is limited, with some dead angles. As the residue blowing period is long, there are too much ash deposited in the heating surface area. They might sintered and also solidify, as well as enhance the cleansing troubles.
defocusing inhibitor as well as pulse gas ash blower.
Nowadays, many biomass central heating boilers adopt defocusing prevention and pulse gas ash blower to resolve biomass boiler slagging and attained impressive impact.
Defocusing prevention is a fuel additive with high melting point and combustion improver. When it is splashed right into the hearth, it will mix with fly ash and adhere to the half-melt ash. It will certainly transform the melting point of ash and damage slagging. It can additionally create steel film on the pipeline surface to prevent acid humidity deterioration.
Pulse gas ash blower can remove the ash down payment on the central heating boiler heating surface by purging, acoustic exhaustion, thermal cleaning and also regional resonance. At last, the gas circulation remove the ash.
Select the very best way to address slagging problem
To utilize high quality biomass fuels in boilers can minimize slagging, but the cost will certainly raise. If you need to utilize low quality biomass fuels, which has high dampness as well as impurities material, slagging is unpreventable. To ensure the stable operating of central heating boilers, you can combine defocusing inhibitor as well as pulse gas ash blower to successfully address the slagging trouble.
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