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Exactly how to resolve the slagging of biomass boilers?<br>
Biomass central heating boilers embraces biomass wastes or biomass pellets as fuel. In richi pellet burning of pellet fuels, the volatiles develop into gas as well as have actually made complex response with smoke and also dust, coagulate as well as follow the home heating pipe surface. The slagging as well as ash down payment will influence the procedure and security of central heating boilers. In this article, I will certainly analyze the features of slagging, find out the factor of biomass central heating boiler slagging, and also put forward effective solutions.



Reasons for biomass central heating boiler slagging

The slagging of biomass central heating boilers describes the ash generated in the burning of biomass fuel. At heat, the ash is in fluid or soft solid condition. Once they touch the home heating surface, they would certainly follow it and develop into slag.



Biomass fuel structure and also environmental medium

The ash melting point is impacted by the structure of biomass gas and environmental tool. If there are incompletely combusted gas, they will make the environmental medium weakly reductive, as well as reduced the melting point. Under this problem, the ash are very easy to attach to the fireplace and the wall surface of superheater. If the biomass fuel has high moisture web content, the steam will certainly soften potassium, which is the major web content in ash.



Impurities in biomass fuels trigger slagging

A large part of biomass fuels are made by greater than 1 raw material. In some cases they are mixed with dirt and sand. These contaminations changed the composition and melting temperature of biomass fuels. With high ash and alkali metal content, these impure biomass gas are easier to trigger slagging.



Not enough air in boilers for burning

Sometimes the biomass gas are distributed unevenly in central heating boilers. They end up being heat combustion mass and melt with not enough oxygen, which will certainly trigger slagging. Not enough ventilation amount will certainly raise the slagging level. Therefore, to avoid biomass boiler slagging, you ought to manage the percentage of gas and also air.



You can readjust the air proportion by eliminating some gas. Besides, slagging might arise from central heating boiler troubles. The feeding tool can cause gas piling and aggravate slagging.



Uneven warm distribution of boiler surface area

The central heating boiler inside temperature level as well as heat distribution have fantastic impact on the slagging. As experience programs, slagging typically shows up in flue as well as superheater surface. When the liquid or soft strong ash approach the home heating surface, it do not have adequate time to cool off, so it is easy to comply with the home heating surface and also accumulate. As researches proved, the greater the boiler temperature level, the more slagging. Slagging wood chip hammer mill of boiler surface, obstruct the flue, enhance the smoke circulation speed, and also aggravate the heating surface wear.



How to resolve the slagging of biomass central heating boilers?

Currently we know the slagging of biomass boilers develops from the biomass gas residential properties as well as boiler layout. To reduce the slagging, we must select high quality biomass pellets and also high-efficiency central heating boilers, as well as regulate the feeding speed. Yet you can not eradicate slagging completely. You require to clean up the biomass boilers on a regular basis.




Heavy steam soot blower

Commonly, they make use of heavy steam soot blower to get rid of slagging in boilers, yet the cleaning impact is hardly acceptable. They need to wash the central heating boiler with high-pressure water.



The potassium in biomass gas create silicon in burning as well as reduced the softening temperature level to 800 ℃, which remains in the range of superheater. So the soften ash is very easy to attach to the heat wall and hard to be removed by steam residue blower



Besides, vapor soot blowers has complying with drawbacks. The central heating boilers cleansed by steam soot blower have to wait for 15 days for following usage. The purging area is restricted, with some dead angles. As the residue blowing interval is long, there are too much ash deposited in the home heating surface area. They might sintered and also set, and raise the cleansing problems.



defocusing prevention and pulse gas ash blower.

Nowadays, several biomass central heating boilers adopt defocusing prevention and also pulse gas ash blower to address biomass boiler slagging as well as achieved remarkable result.



Defocusing inhibitor is a fuel additive with high melting point and burning improver. When it is sprayed into the fireplace, it will certainly mix with fly ash as well as adhere to the half-melt ash. It will certainly transform the melting point of ash as well as destroy slagging. It can likewise create steel movie on the pipe surface to stop acid dew point corrosion.



Pulse gas ash blower can remove the ash down payment on the boiler heating surface by purging, acoustic fatigue, thermal cleansing as well as local resonance. At last, the gas circulation remove the ash.



Pick the most effective way to address slagging issue

To utilize premium quality biomass gas in central heating boilers can decrease slagging, however the cost will certainly enhance. If you need to make use of low quality biomass fuels, which has high wetness as well as pollutants content, slagging is inescapable. To make certain the secure operating of central heating boilers, you can integrate defocusing prevention as well as pulse gas ash blower to properly resolve the slagging trouble.

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