COMPARISON
I believe we have talk in length on Wood Pellet Burner and Gasifier , but question come to mind what is the difference between this 2 .
I believe we have talk in length on Wood Pellet Burner and Gasifier , but question come to mind what is the difference between this 2 .
I list the comparison between the 2 below .
I will explain in details the pro & con for wood pellet burner and gasifier .
Pricing
After countless conversation with so many potential user who is looking for change , the big stumbling block is PRICING AND DISTRUST for new technology .
How cheap can biomass and application equipment goes , no body knows , for now this is the price and there is payback calculation for you to judge .
After considering the price , customer will ask can I see how it works , SEEING IS BELIEVING !!! AGREED .
This problem come about due to so many fly by night equipment provider who have give this industries a bad name . So once it is spoilt , it will be very difficult to make amend .
I append below according to categories , the differences :
Technicality
As mentioned above technical specification for Gasifier are much more higher than simple Wood Pellet Burner . Therefore so many of the gasifier that came up in the market in Malaysia are not successful as we Malaysian have not yet achieve the speciality in Gasification . Unfortunately some potential investor suffer due to lack of information and sweet talk by good marketers .
Wood Pellet Burner are very simple machine with some ingenious controls and design which need very simple maintenance , therefore it can be so successful in Europe due to it's simplicity .
WHO need a sophisticated machine to do the same job for 5 times the price ! ! !
Efficiency
90 % Vs 75% , why ?
a ) all biomass are turned to ash , only the ash weight and loss of heat during combustion , therefore loss is only 10% for Wood Pellet Burner . Whereas for Gasifier , big portion ( 20 % ) are turned to carbon and therefore efficiency is only 75 % with heat loss . Unless you want to sell the carbon !!!
Ash / Carbon Discharge , Operator Needed and Cleaning / Servicing
As Gasification produce carbon which is higher in weight ( 20 % ) compared to fully combusted biomass where it only produce ash ( below 1% for wood pellet ) , therefore Wood Pellet Burner are much more simpler compared to Gasifier .
Moreover more monitoring are needed for Gasifier to ensure Gasification are optimum which is difficult to achieve consistently especially so if the biomass feed are inconsistent .
Gasifier end product is Syngas which is high in Tar level , to ensure burner are not clog , the syngas need to be clean , with scrubber and filtering , which in the end ( once a week , depending on system ) , need to be clean and service otherwise the Gasifier will stop working .
Control of Burner
Wood Pellet Burner as mentioned above are very simple but with good design equipment . Control in the case of firing into Boiler would be very simple , just fire into the boiler , when pressure in the boiler are reach the burner will go into sleep mode and the burner will fire again when pressure drop to lower level set , simply similar to diesel burner , that is why it is so easy .
In Gasifier case , the fuel for firing into boiler is Syngas , sometimes you get good composition syngas , sometimes you do not , so control will be difficult or it would not be optimum or lower in efficiency .
Pros for Gasifier - Application , Flexibility of Burner Positioning , Usefulness of Carbon and Cleanliness of Combustion
Unless you find you need this Pros , these are small benefit you need to forego to attained the pros of wood pellet burner .
You cannot get perfection unless you are willing to pay very high price .
REMEMBER GASIFIER IS 5 TIMES MORE EXPENSIVE !!!
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