Langsung ke konten utama

Chlorine Corrosion, Ghost The Feared Powerplant

Superheater pipes corroded by chlorine
There are 3 groups of biomass used as powerplant fuel around the world based on its quality such as calorific value, ash content and ash chemistry.  First, woody biomass includes all woody trees such as eucalyptus, calliandra, gliricidia and so on. The second group is agro-industry wastes such as ricehusk, baggase, coconut shell, palm shell and so on. While in the third group is grasses.


Although in general the biomass has a low concentration of chlorine (except straw) compared with coal, heavy corrosion occurs in a powerplant that use biomass fuel and cause leaks in the pipes of heat exchanger with  less than 10,000 hours of operation. Corrosion of heat transfer apparatus is strongly associated with ash deposits in the pipes. The mechanism of the complex reactions of chlorine corrosion in boiler pipes like this chart:
The mechanism of corrosion chemical reaction of chlorine

Superheater steam pipes are generally not designed to accommodate the chlorine in biomass fuels. Corrosion mechanisms above are quite well understood by designers and users of biomass boilers in Europe, indications are superheater pipes installed in the low temperature gas zone. Another technology that is able to accommodate biomass fuels with high chlorine levels such as agro-industry wastes and grasses are Circulating Fluidised BedCombustion (CFBC). Temperature pulverized coal (PC) boilers which operate at temperatures up to 1500 C 1400 causing severe corrosion in the superheater pipes, while the CFBC operating at lower temperatures ranging from 850C to 900C. 

Komentar

Postingan populer dari blog ini

10 Advantages By Making Energy Plantations for Wood Pellet Production

Assuredness of supply of raw materials is one of the key factors of business success in the wood pellets. There are two ways to obtain raw materials commonly done today: a. Buying from the owner of source of raw materials. b. Producing its own the availability of raw materials. While the 3rd way and there is still few for business owners make wood pellets is by mix way, which is partly provide by their own of raw materials and some rest buy from the other source of raw materials.
While examining at the types of biomass raw materials there are two kinds, namely : a. Woody biomass b. Non-wood biomass such as agricultural wastes (empty fruit bunches of palm oil trees, corn cobs, rice husks and so on). Currently woody biomass remains a priority to be products of wood pellets as a number of advantages over non-wood biomass which is generally an agricultural wastes, are included in the category of biomass pellets or agri-waste pellets. The comparison between wood pellet and biomass pellet …

Scrambling Biomass Waste Empty Fruit Bunch of Palm Oil: For Paper or Pellets?

In an effort to optimize the full potential of a number of oil companies are planning to process their wastes that resulting from the CPO production process. One of them is empty fruit bunches (EFB).  Two alternatives are being hotly debated is made pellets for energy and for the paper. Viewed from the business side, if it is profitable so is certainly not a problem for the production of both products. Availability of raw materials into one of the important factors in terms of production and business in general.
Further analysis can be done by looking in more detail in the production process technology, the amount of investment, ROI, environmental aspects, sustainability of core business (palm oil) and benefits of the products produced are a number of factors that will make it easier to eventually choose one. Further know more detail about the characteristics of each business such products will also further increase the stability of both products. In the end, the higher score determi…

Wood Briquette Left Behind 25 Years of Wood Pellet

Common areas with wood burning application it will be appropriate to use wood briquette and less suitable when using wood pellets. Various areas in various parts of the world use wood for heating (wood burning stove or boiler) or for cooking. If the ratio of wood as fuel is much so the business of  wood briquette production will be more attractive than wood pellets. Globally wood briquette are less popular than wood pellets, so the wood briquette production is also far below the wood pellets. Wood briquette also has its own characteristics compared to wood pellets.




In general, wood briquette production is also much easier than wood pellets. The particle size, raw materials, moisture content and operations slightly more stringent than the requirements for the production of wood pellets. All wood pellets have a cylindrical shape which is only distinguished diameter of the cylinder, and a commonly used the diameter of 6 mm and 8 mm, while the wood briquette in addition to its shape can …