问题 问答题 简答题

简述啤酒厂糖化设备的组合方式及优点:

答案

参考答案:

(1)二器组合:常见于小型啤酒厂。由一只糖化过滤槽和一只糊化煮沸锅构成一套单式糖化系统,每天可糖化2次左右。该套组合的特点是:一锅二用,投资少,设备利用率高,但生产效率较低。

(2)四器组合:常见于中型啤酒厂。由糊化锅、糖化锅、过滤槽和煮沸锅4只专用设备构成一套复式糖化系统,每天可糖化4次左右。该套组合的特点是设备分工明确,但利用率极不均衡。。

(3)五器组合:常见于中型啤酒厂的技术改造中。在四器组合的基础上,增加一只暂贮罐,用于暂贮过滤后的麦汁,可以此缩短等待煮沸锅的时间,提高整个系统的生产效率,使每天的糖化能力增加到6次。

(4)六器组合:常见于大型啤酒厂。一只糊化锅,一只糖化锅,一只过滤槽和两只麦汁煮沸锅,一只回旋沉淀槽,一只麦汁冷却器。每天可糖化8次左右,该套组合的特点是糊化锅与糖化锅的利用率已达到最高。

阅读理解

B

Sun Liping, 6 , lives in a small village in Yunnan. Her biggest wish is to have running water in her home. All 35 families in Sun’s village have a serious problem--- they don’t have enough water. Every day, the villagers have to walk 20 minutes to get water.

Last year, the worst drought since the 1950s hit Yunnan, making more than 2 million people short of drinking water. This year, the drought is even worse.

Not only Yunnan, but many other provinces in China are short of water as well, such as Gansu and Qinghai.

According to a report on February 17, each Chinese person has about 28% of the world’s average(平均的) person’s amount of available(可用的) water. Two thirds of China’s cities are short of water and nearly 300 million people in rural areas don’t have safe water for drinking.

Every drop of water is important. Waste a drop of water a day and you lose a bucket(桶) a year. How can we use water in a smart way? Here are some tips for you to save water in your daily life:

1. Put plastic bottles of water in your toilet to cut down the water waste when you flush (冲洗) your toilet.

2. Don’t keep the water running while you’re brushing your teeth or washing your face and hands.

3. Use low-flow(低流量) shower heads .

4. Use a bucket to collect shower water while you wait for it to warm up.

5. Make your shower time shorter.

6. Set up a rain bucket to collect rainwater for watering plants or flowers.

小题1: What is the problem in Sun’s village?

A.They don’t have enough food.

B.They don’t have enough water.

C.They have to walk far away to go to school.

D.There are fewer and fewer villagers.小题2: What does the underlined word drought mean in the second paragraph?

A.饥饿

B.干旱

C.水灾

D.贫穷小题3: According to the report, __________________________________.

A. China has just 28 percent of the world’s available water.

Each Chinese person can use more water than the world’s average person.

There is not enough water in two thirds of China’s cities.

D. There are about 300 million people in China’s cities who don’t have enough water.

小题4:Which of the following would lead to a waste of water?

A.Using low-flow shower heads.

B.Collecting shower water while waiting for it to warm up.

C.Taking a quick shower.

D.Keeping the water running while brushing one’s teeth.

单项选择题