摘要
利用PRO/Ⅱ化工模拟软件,对水煤浆气化和粉煤气化过程进行模拟,并将模拟计算值与实际运行值进行比较,误差小于2%,模型基本可靠。考察了氧煤比、煤浆浓度以及不同载气对气化反应的影响。结果表明:在合理的气化温度区间内,低氧煤比有利于获得较高的有效气产量和冷煤气效率;在有效气产量相等条件下,全焦工况的氧煤比最大,掺焦次之,全煤工况最小;煤浆浓度的增加,有助于提高合成气中有效气组成以及产量;在气化温度一定的条件下,氧煤比随着煤浆浓度的增加而降低,煤浆浓度每提高1%,氧煤比下降1%,有效气产量增加1%;CO_2作为载气可以提高合成气中CO含量以及有效气产量;粉煤气化的冷煤气效率高于水煤浆气化,可以达到80%以上。
Using PRO/Ⅱ chemical process simulation software to simulate the process of coal water slurry gasification and pulverized coal gasification. Compared the calculated values with operation values, the error is less than 2%. The model is reliable. The effects of the oxygen to coal mass ratio, coal water slurry concentration and carrier gas on gasification performance were investigated and analyzed. The results show that the in a reasonable range of gasification temperature, lower oxygen coal ratio is beneficial to obtain high effective gas yield and gasification efficiency. While the yield of effective gas is equal, the maximum oxygen to coal mass ratio comes from total petroleum coke, the second place from blend with coke, and the minimal from total coal. The increase of coal slurry concentration is helpful to improve the effective gas composition and the yield of the synthesis gas. Under the condition of a certain gasification temperature, the ratio of oxygen to coal decreases with the increase of the concentration of coal slurry. The coal gas concentration increases by 1%, the oxygen coal ratio decreases by a factor of 1%, and the effective gas production increases by about 1%. CO2 as the carrier gas can improve the CO content and the effective gas yield. The cold gas efficiency of pulverized coal gasification is higher than that of coal water slurry gasification, which can reach more than 80%.
出处
《大氮肥》
CAS
2017年第4期217-223,共7页
Large Scale Nitrogenous Fertilizer Industry
关键词
水煤浆气化
粉煤气化
PRO/Ⅱ
模拟
coal water slurry gasification
pulverized coal gasification
PRO/Ⅱ
simulation
