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straw power generation is one of the straw to optimize the use of the main forms, is a kind of biomass gas power generation, the straw is a kind of very good clean renewable energy, every tons of standard coal calorific value is equivalent to two tons of straw, and its average sulfur content is only three over one thousand. 8, while one percent of the average sulfur content of coal, in the process of biomass utilization, emissions of CO2 and renewable biomass absorption of CO2 in balance, with zero CO2 emissions, to ease and finally solve the problem of the greenhouse effect will be of great significance.
straw power generation generally divided into stages of fuel preparation and transportation, before entering into the fuel of straw processing production line for the fuel preparation stage, the stage to the front of the furnace as fuel from fuel storehouse delivery stage.
1, fuel preparation process
straw by belt conveyor line, Feeding) - > Chopper ( Rough machining) - > Hammer mill ( Fine machining) - > Cyclone separator ( The separation of the chopped straw and dust, straw into the bin) - > Bag filter ( Dust recycling, emissions)
2, fuel delivery phase of the process
straw by is located in the lower fuel storehouse layout of driven by frequency conversion motor drive transverse discharge screw conveyor and then into a vertical screw conveyor. Out of the vertical screw conveyor of fuel into the discharging mouth screw valve. By a fan will from the fuel storehouse of the lower part of the discharging mouth in the form of a pneumatic respectively into combustion burner.
straw power advantage mainly displays in the following aspects:
1, crop JieGanLiang big, wide coverage, sufficient fuel source.
2, straw sulfur content is low. The world power organization concerned research indicated, straw uniform sulfur content as long as three over one thousand. 8 and the coal sulfur content is about one percent. And low temperature burning less nitrogen oxide, so after dust removal without desulfurization of flue gas, flue gas can be directly through the chimney into the atmosphere. Denmark and other countries of the experiments indicate the straw boiler operation after dust of flue gas purification measures do not add other can completely meet the requirements of environmental protection. So the straw power generation not only has good economic benefit, and outstanding ecological benefits and social benefits.
3, all kinds of crop straw calorific value slightly different, but the mensuration, straw calorific value is about 15000 kj/Kg, appropriate in 50% of standard coal. In the wheat straw, corn straw calorific value in crop straw as the smallest, low calorific value has 14. 4 mj/kg, appropriate zero. 492 kg of standard coal. The use of straw power generation, can reduce the coal consumption.
4, usually contains 3% ~ 5% of straw ash content, the ash boiler fly ash and ash/furnace bottom ash is collected, contains abundant nutrients such as potassium, magnesium, phosphorus and calcium, can be used as a efficient agricultural fertilizer.
5, as a fuel, coal mining are must be dangerous, especially mine mining, processing is difficult. Crops straw and comparison, the risk is small, easy processing, and belongs to the waste recycle.