Prize-winning Quiz on Coal Chemical Engineering Knowledge 6
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1. Describe the advantages and disadvantages of pressurized gasification compared to atmospheric pressure, and what are the economic indicators for the operation of a gasification furnace? Reference answer: Advantages: 1) Pressurized gasification increases the concentration of reactants, accelerating the reaction rate and improving gasification efficiency. 2) Pressurized gasification enhances the conversion rate of carbon. 3) Under pressure, the volume of gases decreases; thus, with unchanged gas production, the size of the equipment can be reduced, minimizing the required space. This allows for an increase in the amount of gas produced per furnace, facilitating larger-scale operations. 4) Pressurized gasification helps to reduce energy consumption. 5) It also improves the quality of atomization of coal water slurry. Disadvantages: 1) High requirements for equipment; the initial investment is higher than that for normal-pressure systems, and a specialized air separation unit is required. 2) The operation is relatively complex. 3) High steam consumption. 4) Relatively high requirements regarding the type and particle size of the raw materials. The economic indicators for the operation of a gasification furnace include 1) gas production rate ； 2) Carbon conversion rate 3) Hydrogen conversion rate ； 4) Effective gas yield ； 5) Coal consumption, oxygen consumption, etc. Last edited by wbp on 2009-4-7 23:55 in this post.]
Advantages of pressurized gasification: accelerates the reaction rate and improves gasification efficiency； It helps to improve the atomization quality of water-coal slurry ； It reduces the size of the equipment, increases the gas production per furnace, and facilitates large-scale operation. Disadvantages: such as increased equipment costs, etc.