Impact of internals in stripping section of vacuum distillation tower ( fuel type) on vacuum cut yield 燃料型减压塔汽提段内件型式对拔出率的影响
It is concluded from the analysis that the culprit of cracking is the mal-fluidization of stripping steam as all the crackings of stripping section have devel-oped near the steam. 认为沉降器汽提段穿孔部位均发生在汽提蒸汽附近,汽提蒸汽流化异常状态是造成穿孔的根本原因。
Whereas, the plugging of nozzles of steam rings in the stripping section and defects of welding of ring baffle with shell are the main causes of cracking failures. 而汽提段蒸汽环管部分喷嘴发生堵塞、环形挡板与器壁接合处下方焊接缺陷的存在是汽提段发生穿孔的主要原因。
The countermeasures for maintaining the operation under the conditions of cracking of stripping section are recommended. 提出了汽提段穿孔情况下的生产维护对策。
The adsorbed substances on the catalysts sampled from different parts of the commercial RFCC stripping section and stripping process were analyzed. 对重油催化裂化工业装置汽提段不同部位所取得的催化剂上的吸附物的特点进行了研究,并对其汽提过程进行了分析。
A high-efficient rectification column was used to reduce the content of azine in wastewater. Azine was stripped from wastewater at the stripping section and concentrated at the rectification section to meet the recovery requirement. 为降低含酮连氮废水中的酮连氮含量,采用高效精馏塔,在提馏段将酮连氮从废水中汽提出来,在精馏段通过精馏将有机物料浓缩,达到回收的要求。
The flowsheet of FCC absorption/ stabilization unit is simulated and analyzed in this paper. The flowsheet of double tower for absorption/ stripping section is replaced by single tower in simulation, and a new flowsheet of single tower is developed. 对催化裂化吸收稳定系统进行了流程模拟与分析,提出了吸收/解吸双塔流程的单塔实现方法,并提出了新的单塔流程模型。
The restrictive effect of the open-extent of discharge valve on solid circulating rate is obvious, and the increase of overall pressure drop in the holding gas section is more notable than that in the stripping gas section. 下料阀开度对固体循环流率有明显的约束作用,且使持气段总压降增加较脱气段更为明显;
In order to provide the necessary temperature driving force for the heat to be transferred from the rectifying section to the stripping section, the former must be operated at a higher pressure than the latter. 为了提供传热必须的推动力,精馏段将在较高的压强下进行操作,为了调整压强,两段之间安装了压缩机和调节阀;
Reflux ratio of distillation column without stripping section 不设提馏段的精馏回流比
Through the calculation of gear shaped, citrus shaped and cross shaped cross section boundary length, the relationship between stripping difficulty and cross section of composite superfine fiber was explained, which stripping difficulty increases with the increase of boundary length of two components. 通过对齿轮形、米字形、桔瓣形复合超细纤维截面边界长度的计算,说明了复合超细纤维的截面形状与剥离性的关系,剥离难度随两组分边界线长度的增大而增大。
Revamp of Stripping Section of 0.8Mt/a FCC Plant 0.8Mt/a催化裂化装置汽提段的改造
The location of feed tower plate are determined by this point, according to feed state, the number of stripping section tower plates and the number of enriching section tower plates are calculated from this point by the plate to plate calculation methods, which the graphical method. 结合加料板的进料状态,以此点展开连续精馏塔精馏段板数的计算和提留段板数的计算,无论是逐板计算法还是图解法都有别经典的从塔顶计算的方法。
The temperature of the sensitive plate in stripping section could be controlled on the setpoint precisely, but control of product quality on the top of column was not considered in this method;② Neural network based multivariable predictive control. 提馏段灵敏板温度能够精确控制在设定值,但该方案没有考虑塔顶酸含量的控制问题;②多变量神经网络预测控制。
Results: Observation of bone cement: All the femoral head is round and smooth, without stripping and articular cartilage degeneration. Bone cement embedded between trabecular at the section of femoral neck. 结果:骨水泥形态学观察:大体观察所有股骨头外形圆而光滑,关节软骨无剥脱及变性,股骨颈断面可见骨水泥嵌入骨小梁之间。
By analyzing the relationship between the gas component and its explosion limit at each theoretical plate in the low-temperature distillation tower, it presents the distillation tower structure with a low-temperature distillation stripping section and a reboiler, and without a rectifying section and a condenser. 分析了低温精馏塔内部不同理论塔板上气相组分变化与爆炸极限的关系,提出了低温精馏塔采用只有提馏段和再沸器,没有精馏段和冷凝器的结构。