问题 问答题


某发电项目信息如下。
项目名称:电厂新建(2×350MW)机组工程
建设内容:该工程新建2台35万千瓦燃煤发电机组及配套环保处理设施等。
工程投资:工程实际总投资40.56亿元,其中环保投资21761万元,占工程总投资的5.4%。
工程建设情况:2007年11月正式开工建设,2011基本建成,同年11月投入试运行。
监测期实际生产负荷:满负荷生产。
工程相应的环境保护设施与主体工程同时设计、同步施工、同时投入使用。工程配套建有双室四电场静电除尘器4台和210m烟囱1座,含油污水处理系统,工业污水处理系统、煤场及输煤系统冲洗水的沉煤池、水力除灰闭路循环系统,贮灰场和生活污水处理系统等环保设施。对噪声源采取了隔声降噪措施。厂区绿化面积9万平方米。
[问题]

营运期大气污染防治措施有哪些

答案

参考答案:

解析:主要大气污染物为锅炉烟气中的SO2和烟尘,此外堆煤、卸煤、煤粉碎、煤输送、渣场、灰库等也将产生一定的粉尘污染,因此可以考虑以下措施:
(1)保证足够的除尘水量,检查并更换损坏的喷头、湍流球等配件以保证除尘效率;
(2)设置烟气自动监测系统,以便及时掌握烟气除尘脱硫设施的运行性能,反馈于生产调度;
(3)从多个角度考虑脱硫,原煤炉前处理和净化技术、炉内燃烧中脱硫以及燃烧后的烟气脱硫;
(4)采用除尘设备,比如布袋式除尘器,将废气排放的粉尘含量降到最低。

阅读理解

Welcome to Australia

The Great Outdoors

Australia is the world’s oldest continent and indigenous Australians have one of the world’s oldest culture.

In Australia you will see unique plants and animals and some of the most beautiful scenery in the world. Many parks have information centres offering advice on where to go, what to see and how to see it--for both your personal safety and to protect our sensitive, natural environment.

Banks and Money Matters

Banks are generally open between 9:30am and 4pm on Monday to Thursday and 9:30am and 5pm on Friday.

Foreign currency or traveller’s cheques can be changed at all banks and some of the larger hotels. There are currency exchange facilities at all international airports.

         

Take care! Our sunlight is very strong and you can get sunburnt.

For best sun protection, it is advisable to wear:

A broad-brimmed hat

A shirt with a collar and sleeves

Sunscreen with high protection factor.

Swimming

We have so many beautiful places to swim--beaches, lakes, rivers and creeks.

Many of our waters are safe for swimming, but if you have any doubts, ask before entering the water.

Most of our popular ocean beaches have patrols with life-saving service. Red and yellow flags mark the area that you are advised to swim within. 

If there are no flags and no life guards on the beach, talk to local people about the best areas to swim.

Staying Safe on the Roads

Australians drive on the left-hand side of the road.

For safety, everyone in the car, including children, must wear a seat belt.

Motor cyclists and bicyclists are required to wear a helmet.

Watch out for native animals crossing the roads, especially at night. Road signs are erected in places where animals are commonly seen.

小题1:What is the best title of the third part of the passage?

A.The Sun

B.Enjoy the Sun

C.Warning

D.Outdoor Activities小题2:If you arrive in Sydney at 5:10pm on Friday, where can you probably get your money changed on that day?

A.At a bank.

B.At any hotel.

C.At a store

D. At the airport小题3:What advice can you get at the park information centre?

A.Advice on how to wear a broad-brimmed hat.

B.Advice on how to drive safely in the park.

C.Advice on how to protect our environment

D.Advice on where to go to see a kangaroo.小题4:How can you ensure your safety when swimming?

A.You can swim in whichever lake you like

B.You should swim with the life guard.

C.You can swim where there are red flags.

D.Always find a local person to ask about how to swim.小题5:Which of the following word might be the closest in meaning with the underlined word “erected”?

A.set up

B.protected

C.stood

D.noticed

单项选择题