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操作题:用文字叙述烛式硅藻土过滤机的操作?

答案

参考答案:

烛式硅藻土过滤机的操作过程为:

①准备工作:用脱氧水将整个过滤系统充满,循环5~10min,清酒罐用CO2或N2气背压。

②预涂循环:粗细硅藻土搭配,用脱氧水或已滤啤酒按1:5~10的比例混合,进行两次预涂,预涂时,过滤机进行10~15min的循环。

③进酒顶水:引入待滤啤酒,将过滤机内的预涂水缓慢压出,直至酒头浓度合格。

④过滤:未滤啤酒自下而上流入过滤机,并穿过烛棒被过滤,至滤液浊度符合要求,打入清酒罐。不断添加硅藻土,烛棒上的硅藻土层越来越厚,过滤精度越来越细,进口压力也越来越高,达到允许的极限压差必须停止过滤。

⑤过滤结束:过滤结束时,脱氧水自下而上将机内的啤酒顶出,注意酒尾浓度。

⑥排放硅藻土:从过滤机顶部即过滤反方向进入压缩空气,将废硅藻土从烛棒上吹出,从过滤机底部排出。

⑦清洗杀菌:以与过滤反方向进行清洗,空气和水混合通入,在烛棒上形成旋涡,从而加强清洗效果。清洗干净后,用80℃以上热水充满杀菌备用。

阅读理解

阅读理解

     I shall never forget the night, a few years ago, when Marion J. Douglas was a student in one of my

adulteducation classes.He told us how tragedy had struck at his home, not once, but twice.The first time

he had lost his fiveyearold daughter.He and his wife thought they couldn't bear that first loss; but, as he

said, "Ten months later, God gave us another little girl and she died in five days."

      This double bereavement was almost too much to bear."I couldn't take it, " this father told us"I

couldn't sleep, eat, rest or relax.My nerves were entirely shaken and my confidence gone."At last he

went to doctors; one recommended sleeping pills and another recommended a trip, but neither helped.

He said, "My body felt as if it was surrounded in a vice (大钳子), and the jaws of the vice were being

drawn tighter and tighter." The tension of grief (悲伤)-if you have ever been paralyzed (使瘫痪) by

sorrow, you know what he meant.

     "But thank God, I had one child left-a fouryearold son.He gave me the solution to my problem.One

afternoon as I sat around feeling sorry for myself, he asked, 'Daddy, will you build a boat for me?' I was

in no mood to build a boat; in fact, I was in no mood to do anything.But my son is a persistent little fellow!

I had to give in.Building that toy boat took me about three hours.By the time it was finished, I realized that

those three hours spent building that boat were first hours of mental relaxation and peace that I had had in months!I realized that it is difficult to worry while you are busy doing something that requires planning and

thinking.In my case, building the boat had knocked worry out of the ring.So I determined to keep busy."

     "The following night, I made a list of jobs that ought to be done.Scores of items needed to be repaired.  Amazingly, I had made a list of 242 items that needed attention.During the last two years I have

completed most of them.I am busy so that I have no time for worry."

     No time for worry!That is exactly what Winston Churchill said when he was working eighteen hour's

a day at the height of the war.When he was asked if he worried about his huge responsibilities, he said, "I

am too busy.I have no time for worry."

1. The underlined word "bereavement" in the second paragraph refers to________.

A. having lost a loved one

B. having lost a valuable article

C. having lost a profitmaking business

D. having lost a wellpaid job

2. Marion felt his body as if it was caught in a vice because________.

A. he couldn't earn enough money to support his family

B. he was suffering from sleeplessness disease

C. he couldn't get out of mental pressure

D. he felt tired of adulteducation classes

3. Marion made a list of over 200 items that needed to be repaired because________.

A. he hadn't been able to spare time to mend them

B. he wanted to kill his free time by repairing them

C. the items had actually been broken and needed attention

D. repairing the items helped crowd worry out of his mind

4. At the end of the passage, the author wrote about Winston Churchill in order to________.

A. prove that he followed Churchill's example

B. support his student's solution to his problem

C. show that he was successful in his career

D. clarify how his conclusion was reached

配伍题 B型题