PAPER SLUDGER/PLASTIC WASTE FIRING CFBC BOILER
We have successfully installed boiler using paper sludge/plastic waste 500 ton a day at Tianjin City of China in 2008. This papermill has 500 tons of waste materials from their process. 200 ton of paper sludge with almost 74% water content, and 300 tons of waste plastic of mixture of screen reject, pulper reject and rag rope which has a content of steel wired that must be removed first and water content is about 59%. In order to reach required heating value and water average water content, coal of about 154 ton/day is mixed to have the average water content of 51.36%. With this water content, heating value will become 2,113 Kcal/Kg.
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| HAMADA BOILER EYES ON BIOMASS FUEL BOILER IN 2012 |
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BANGKOK: In the year 2012, Hamada Boiler will continue its reseaarch into more widely for various biomass Fuels. Water-cooled Vibrating grate which has successful record in burning rice straw in the northern part of China is one of the great achievement since 2005. New technology of High- Low differential pressure bed Fluidized Bed (ICFB) will solve a lot of problems of Biomass fuel's low melting ash point as explained in the front page of this news paper. Large furnace with low velocity flue gas speed and low furnace temperature are the kep point for the solution for manay probledmatic biomass fuels. In Honduras, Central America, we have inistalled 35 ton |
capacity Biomass Boiler burning Arundo Donax fiberous fuel which ash meltiing point is as low as 800-900 oC. In Central American counbtries, demand of Biomass fuel boilersishighandHamada Boiler will expand its ac- tivity together with its sole agent, G.A. EXPERTISE of Miami, USA, who is representing Hamada in the whole Central Ameri- can couintries. |
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THE LATEST HEAT PIPE TECHNOLOGY
THERMAL VACUUM TUBE WASTE HEAT |
This technology is really a revolu- tionary for the low temperature flue gas of 300-500 oC. Before, waste heat recovery boiler uses ordinary boiler tube and low temperature flue gas passes through the boiler, thus needing huge area of heating sur- face for the low temperature gas and causing a serious problem of carbon accumulation inside the boiler that will automatically increase the air re- sistance which might cause damage to the diesel generator engine. Now, with this new technology, flue gas of low temperature do not go into the boiler, instead, gas will get in touch with only completely sealed straight tubes (finned) with total vacuum inside and filled with spe- cial chemical. Under the vacuum condition, water (H2O) will evapo- rate at much lower temperature than the evaporation temperature of 100 oC below atmospheric pressure of 1 kg./cm2 (absolute pressure) |
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This paper factory produces paper sludge of almost 200 ton/day with 65-74 % water content and directly used to the boiler without drying but with coal mixture. If this sludge will be dried, coal consumption will be reduced accordingly. 500 T per day waste firing capac- ity/ 75 ton CFBC 39 bar 450 oC 15 MW turbine power plant x 2 Tianjin, near Beijin China.
China do not have the restriction of transport of plastic waste and this plant uses raw and wet plastice waste as fuel.<
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This chart is the data of daily disposal of plastic waste from the waste paper processing for carton box paper of one of the biggest factory in Taiwan,. There are 3 kinds of wastenamely "pulper reject" "screen re- ject" and Rage rope". Rage rope contains steel wires which must be removed by magnetic steel separator. In Taiwan, government restrict the transport of this kind of plastic waste if it is considered as industrial waste. Therefore, this must be processed first to become RPF. Then transporting it will be allowed as fuel. (Same law applies in Japan)
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