浮床运行至终点,停运后,树脂借本身的重力逐层下落,称为重力落床。这种方式不会引起树脂乱层,又可起到疏松树脂层和排除树脂层中气泡作用,床层表面平坦,利于再生。
相关试题
【简答题】
混床反洗分层分界面不明显的原因有哪些?
【简答题】
惰性树脂层在浮床离子交换设备中起何作用?
【简答题】
为什么离心泵内进入空气就不能正常工作?
【简答题】
树脂再生后的清洗和运行前的清洗目的有何不同?
【简答题】
在树脂再生过程中置换、正洗的作用是什么?
【简答题】
在阴床中混入少量阳树脂,会产生什么影响?
【简答题】
电力生产过程中对环境造成的主要污染有哪些?
【简答题】
为什么离子交换器内树脂层有空气时对再生有影响?
【简答题】
化水凝水装置产水要求满足哪些水质指标?水质指标的选择依据是什么?
【简答题】
混床设有上、中、下三个窥视窗,它们的作用是什么?
【简答题】
阴阳床再生过程中,水往计量箱中倒流,试分析产生的原因。
【简答题】
过滤运行中,反洗不彻底会表现出什么现象?
【简答题】
为什么单元制一级除盐系统中,阳床失效时,除盐水电导率会上升?
【简答题】
离子交换树脂长期使用后,颜色变黑、交换容量降低的原因?应如何处理?
【简答题】
阳床出水酸度正常,硬度突然升高为什么?
【简答题】
为什么离心泵内进入空气就不能正常工作?
【简答题】
再生时混床树脂分层效果与哪些因素有关?
推荐试题
【单选题】
—Jim,do you like apples ___________ bananas? —I like bananas.
A. and
B. but
C. or
D. because
【单选题】
—Can you help me ___________ my math? —Sorry,I am too busy today.
A. on
B. with
C. for
D. from
【单选题】
Jenny likes hamburgers. And I ___________ like them.
A. too
B. so
C. also
D. and
【单选题】
—___________ can he do? —He can ________ Chinese kung fu.
A. How;play
B. What;do
C. Where;see
D. What;make
【单选题】
Laura is from England and she ___________ English very well.
A. tells
B. says
C. speaks
D. takes
【单选题】
Saturday and Sunday are our ___________.
A. clubs
B. weekends
C. birthdays
D. games
【单选题】
Does Mr. Green teach ___________ Chinese?
A. they
B. you
C. I
D. he
【单选题】
Mom,I need you ___________ me a notebook.
A. buy
B. buying
C. to buy
D. to buying
【单选题】
Today Lucy's parents aren't at home so she wants to ___________ us for lunch.
A. join
B. make
C. think
D. know
【单选题】
Bill likes ________ but he doesn't want to be a ___________ when he grows up.
A. music;musician
B. music;music
C. musician;music
D. musician;musician
【单选题】
Old people all like Alice because she ___________ them.
A. is good at
B. is good for
C. is busy with
D. is good with
【单选题】
—Can you ___________ your new photos ________ me? —Yes. Here you are.
A. show;with
B. show;to
C. show;for
D. show;about
【单选题】
—Can you play the guitar? —___________,but I can play the piano.
A. No,I don't
B. No,I can't
C. Yes,I do
D. Yes,I can
【单选题】
—Lily,___________? —She wants to join the art club.
A. does your sister want to join the art club
B. what is your sister good at
C. what does your sister like
D. what club does your sister want to join
【填空题】
11.Kate can play the guitar改为否定句. Kate ___ play the guitar.
【填空题】
12.I can speak English改为一般疑问句. ___ you ___ English?
【填空题】
13.你姐姐擅长画画吗? ___ your sister ___ drawing?
【填空题】
14.你想加入什么俱乐部? ___ do you want to ___ ?
【填空题】
15.杰克想加入象棋俱乐部吗? ___ Jack want to ___ the ___?
【填空题】
16.老师经常给我们讲故事。 Our teacher often ___ for us.
【填空题】
17.你会什么运动项目? What ___ you play?
【填空题】
18.我哥哥在学校里喜欢结交朋友。 My brother likes to ___ at school.
【填空题】
19.他们周末想要去动物园。 They want to go to the zoo ___ .
【填空题】
20.谢谢你帮我学地理。 Thank you for ___ my geography.
【填空题】
21.我们班里没有一个同学会打鼓。 No students can ___ in our class.
【填空题】
22.学校的音乐节在九月。 The school ___ is in September.
【填空题】
23.李明经常和我下国际象棋。翻译句子 Li Ming often ___ with me.
【填空题】
24.王玲想加入我们的排球队。翻译句子 Wang Ling ___ our volleyball team.
【填空题】
25.他们学校有一个美术俱乐部。翻译句子 There is a/an ___ in their school.
【填空题】
6.I want ___ a hat for my mother. /buy/
【填空题】
7.The little boy can ___ volleyball well. /play/
【填空题】
8.My cousin likes ___ English songs. /sing/
【填空题】
9.There are eight ___ in our school. /club/
【填空题】
10.—Can you swim? —No,I ___ /not/.
【填空题】
56.Do you have lunch at ___ [家] or at school?
【填空题】
57.Our store is in the ___ [中心] of the city.
【填空题】
58.There are two ___s [钢琴] in this classroom.
【填空题】
59.Yang Liping likes to ___ [跳舞] very much.
【填空题】
60.He often tells ___ [故事] about the old man.
【填空题】
61.Two old ___ [violin] are on Lily's bed.