秸稈煤炭成型機(jī)英文翻譯翻譯--秸稈壓塊成型燃料技術(shù)在我國的應(yīng)用及難題-其他專業(yè)(編輯修改稿)
2025-02-24 01:11 本頁面
【文章內(nèi)容簡介】 Although biomass fuel got rapidly developed, there are still several important problems ,such as biomass resource gathering 、 mechanical abrasion in densification process、 sediments of clinker and cauterization of the hearth, all of which need to be solved urgently. It’s them that restrict the step of the industrialization of biomass densification fuel. Biomass Resources and Resources Gathering Demand of Biomass Resources The total resources of agricultural and forest industry should be taken into account in the development process of biomass energy in order to avoid exceeding the supply ability of resource. The gross of resource: （ just takes corn stalk as an example） The output of corn stalk is about 5000 kg per hectare, So that we can get 10 tons corn stalk every 2 hectare. Resource consumption: If the efficiency of generating electricity is 25%, 1Kg corn stalk can generate 1 kWh electricity （ the mean ） , so a 1MW power generator can generate 1000kWh electricity in an hour, which will consume 1000kg corn stalk. It means that 24000kg corn stalk yield by hectares are needed in one day. If the generator operates 300 days in a year, which need 7200,000kg corn stalk yield by 1,440 hectares, about 8 villages each of them inhabit by 400 doors that can fill the generator. Cost of resource: The price of corn stalk is 300yuan/ton, 7200 ton cost 2 million yuan. Resource (Straw Stalk) Gathering The system of resource supply is dispersive and mainly depends on handwork. This is different from the mechanized farming model of the developed countries. In China straw stalk gathering is one bottleneck of mechnaization of BBDF production which should deserve more attention. Just take a 1MW power plant as an example, a truck can carry 4m3 only 1000kg unsmashed corn stalk every time, it needs the truck run 7,200 times to ship all the corn stalk that the power plantneeds. It is difficult to realize in practice. If the power plant buys reaping machines and harvest the corn for the farmer. They can take the corn stalk directly and easily from the farm. The cost is 70 yuan every unit area, if adds the allowance pay to the farmer, the cost of corn stalk is 50yuan/ton. Only in this way the power plant and the farmer can establish a good fellowship, and make the automatization of electricity generation match with the gather and pretreatment in China. Or there will e forth the problem that the modern techniques of electrical generation conflict with the resource collecting, lead to the power plant operate abnormally. Table1 and Table 2 is centralized and dispersive collecting model. In summary, the dispersive collecting model of onevillageonestation fits well for the family yielding rule of China. It’s a realistic blue print which can be generalized in most area of China where the mechanized collecting can not be practiced. The mechanized collecting model and the dispersive collecting model of onevillageonestation can be bined in the areas where mechanization can be realized by the way speaking for plant from farmers. Problem of Mechanical Abrasion The densification was realized by the relatively high speed movement between the deriving part of screw press or pelleting machine and the biomass stalk. The heat produced by the friction intenerates the cellulose and lignose while the press pushes the stalk into the densification mould. As the screw always runs under the high pressure and temperature, and always in the frictio
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