问题 问答题 简答题

脱吸塔压力的影响因素有那些,如何控制?

答案

参考答案:

影响因素:

1)脱吸塔进料温度、进料量上升,脱吸塔压力上升;

2)脱吸塔进料组成变轻,脱吸塔压力上升;

3)脱吸塔底重沸器出口温度上升,脱吸塔压力上升

4)仪表失灵,脱吸气排不出去,脱吸塔压力大幅度上升。

调节方法:

1)正常情况下,脱吸塔顶压力由PIC-1301调节脱吸气至E-305/1,2的量来自动控制;

2)由TIC-1301调节E-302管程中稳定汽油流量,控制脱吸塔进料温度;

3)控制脱吸塔底重沸器出口温度,脱吸塔底液面平稳;

4)仪表出现问题,可改走付线控制,并联系仪表处理。

填空题

Today, we’ll talk about what other effects watching TV might produce on children. Children should be (1) a lot of television, many experts and parents agree, but there is at least one circumstance when it might be beneficial: (2) . A recent study conducted by Italian researchers found that children (3) immediately preceding and during blood tests experienced less pain than children whose mothers (4) during the procedure, or children whose mothers were present but (5) .
The research, led by Carlo Brown, MD, at the University of Siena, is published in the Archives of Disease in Childhood. (6) the study. None received any type of anesthesia; the children and their mothers (7) . Both the group whose mothers attempted to distract them from the blood tests and those whose mothers simply observed reported (8) than the group who watched cartoons. For that group, the levels of pain were less and the children were better able to (9) .
One of the possible explanations is that children might have (10) during the procedures, exacerbating their perception of pain. "The higher pain level reported by children during (11) shows the difficulty mothers have in interacting positively (12) in their children’s life," the authors write.
However, they stressed that (13) still provided benefits, noting that the children would (14) during the procedures. "Indeed, children state that having their parent present (15) when in pain," say the authors.
Another possibility offered for consideration is the notion that the (16) might release pain-quelling endorphins. Endorphins, (17) produced by the pituitary gland, resemble opiates in their ability to produce analgesia and a sense of well-being. In other words, they might (18) .
In any case, the study results suggest that health workers should (19) to watch television during painful procedures (20) .

单项选择题