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Air-Based Coal Gasification in a Two-Chamber Gas Reactor with Circulating Fluidized Bed

机译：带有循环流化床的两室煤气反应器中的气基煤气化

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During the bed gasification of solid fuels, the process temperature in the reaction zone is not high enough for reaching the maximum rate of the chemical efficiency factor of the gasification process. In order to increase the chemical efficiency factor, it is necessary to supply extra heat to the reaction zone to increase the reaction temperature. In this article, coal gasification in a chamber with forced fluidized bed is considered and it is proposed to supply extra heat with a circulating flow of an inert particulate heat transfer agent. Circulating inert particulate material is successively heated by coal combustion in a cone chamber with bubbling fluidized bed and in a combustion chamber with a spherical nozzle that inhibits the forced fluidized bed. After that, the heat transfer agent heated to 930-950℃ enters first in a gasification chamber with bubbling bed and then in a chamber with forced fluidized bed, where it transfers the physical heat to the air fuel mixture. The experiments conducted with crushed Borodinsky coal and inert particulate heat transfer agent (electrocorun-dum) showed the temperature rise in a gasification chamber with from 760 to 870℃ and the increase in the combustible component (CO) concentration in the gasification products by 5.5%. Based on the kinetic equations of the fuel combustion reactions and the CO_2 reduction to CO and on the thermal balance equations of combustion and gasification chambers, the simulation model for the gas composition and the temperature rate calculated by the height of reaction chambers was developed. The experimental temperature rates and product gas compositions are in good agreement with the simulation results based on the proposed kinetic gasification model.
机译：在固体燃料的床气化过程中，反应区的过程温度不够高，无法达到气化过程化学效率系数的最大速率。为了增加化学效率因子，必须向反应区提供额外的热量以增加反应温度。在本文中，考虑了在具有强制流化床的腔室内进行煤气化，并提出通过惰性颗粒传热剂的循环流提供额外的热量。在带有鼓泡流化床的锥形室中和在带有球形喷嘴的燃烧室中，通过煤燃烧，循环的惰性颗粒材料被煤燃烧依次加热，球形燃烧室中的球形喷嘴抑制了强制流化床。之后，加热到930-950℃的传热剂首先进入带有鼓泡床的气化室，然后进入带有强制流化床的室，然后将物理热传递给空气燃料混合物。用破碎的Borodinsky煤和惰性颗粒传热剂（electrocorun-dum）进行的实验表明，气化室中的温度从760℃升高到870℃，气化产物中可燃成分（CO）的浓度增加了5.5％ 。基于燃料燃烧反应和CO_2还原成CO的动力学方程，并基于燃烧室和气化室的热平衡方程，建立了由反应室高度计算得到的气体成分和温度速率的仿真模型。实验温度速率和产物气体组成与基于所提出的动态气化模型的模拟结果非常吻合。

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