Method for predicting yield of pyrolytic coke of baked biomass
A technology for biomass pyrolysis and coke yield, applied in prediction, instrumentation, data processing applications, etc., can solve problems such as complex models, many parameters, and lack of prediction of biomass coke yield
Active Publication Date: 2020-12-29
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
In the domestic and foreign research so far, there is only a method suitable for predicting the yield of coal pyrolysis coke, and the method requires many parameters and the model is complicated; but there is no method for predicting the yield of biomass coke
Method used
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[0041] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the following examples.
[0042]In this example, a kind of hardwood (lotus wood) from southern China is used as a raw material. A certain number of lotus wood balls are placed in a ceramic crucible for each baking experiment. After the temperature and atmosphere in the furnace reach the set value, the raw material together with the crucible Send it to a tube furnace with three temperature zones for baking. The variation range of the baking temperature in this experiment is 200-300°C, the variation range of the residence time is 30min-240min, and the variation range of the oxygen concentration is 0-10vol%. The roasting mass yield can be calculated by weighing the mass of the solid product before and after roasting with an analytical balance. Definition Roasting ...
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The invention discloses a method for predicting the yield of pyrolytic coke of baked biomass, which comprises the following steps: respectively carrying out aerobic baking and anaerobic baking on biomass to obtain a first solid product and a second solid product, and performing calculating to obtain a first baking mass yield and a second baking mass yield, putting the first solid product and the second solid product into a slow pyrolysis device for slow pyrolysis to obtain fixed carbon content, putting the first solid product and the second solid product into a rapid pyrolysis device for rapidpyrolysis to obtain a rapid pyrolysis coke sample, performing weighing to obtain the mass of rapid pyrolysis coke, and further obtaining the relative coke yield and the absolute coke yield; respectively taking the first baking mass yield and the second baking mass yield as independent variables, taking the fixed carbon content as a dependent variable, obtaining a prediction model under slow pyrolysis, respectively taking the first baking mass yield and the second baking mass yield as independent variables, taking the relative coke yield and the absolute coke yield as dependent variables, andobtaining a prediction model under rapid pyrolysis, so as to predict the coke yield.
Description
technical field [0001] The present invention relates, in particular, to a method for predicting the pyrolysis coke yield of torrefied biomass. Background technique [0002] Traditional torrefaction (anaerobic torrefaction) is usually a mild pyrolysis technology under normal pressure inert atmosphere conditions of 200°C to 300°C, which can remove moisture and light volatiles from biomass raw materials to obtain low-moisture , High energy density, good grindability fuel. Compared with the anaerobic environment, using boiler flue gas as the torrefaction atmosphere can not only improve the economy of the torrefaction process, but will not significantly reduce the fuel quality of biomass (grindability, hydrophobicity, calorific value compared with anaerobic torrefaction does not There will be too much change), so it has the potential for large-scale application in industry. Affected by the excess air coefficient, the oxygen concentration in the boiler flue gas usually varies be...
Claims
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IPC IPC(8): G16C20/10G16C10/00G06Q10/04G06Q10/06
CPCG16C20/10G16C10/00G06Q10/04G06Q10/067Y02E50/10
Inventor 卢志民李鑫姚顺春
Owner SOUTH CHINA UNIV OF TECH