问题 问答题 论述题

投用丁二烯气体压缩机步骤(GB-101)。

答案

参考答案:

当第一汽提塔开始汽提出气体时,启动GB-101。

(1)将下列阀门全开

A.压缩机吸入主阀。

B.压缩机返回至EA-106进口管线上的HCV-102。

C.吸入压力调节阀。

(2)确认下列阀关闭

A.排出压力调节阀PIC-109。

B.至DA-103的进料阀FIC-118。

(3)确认压缩机的工艺和机械联锁装置及其附属设备,例如润滑油系统,氮封系统,冷却水等都已安排就绪。

(4)确认压缩机吸入压力约为0.03MPa以下后,启动压缩机。

(5)压缩机排出压力先用HCV-102手动调节在0.55MPa。

(6)缓慢地打开通入DA-101B塔底返回管线上的PIC-109,注意勿使吸入压力成负压,然后手动操作HCV-102和PIC-107,使压缩机吸入压力调节在0.005MPa,同时,手动调节PIC-109,将压缩机的排出压力保持在0.55MPa,如果压缩机吸入压力达到0.005MPa则关闭FA-103顶部的放空阀HCV-101。此时,DA-102汽提气进入压缩机,压缩后气体全部返回至DA-101B塔底。

单项选择题
单项选择题

水下旅馆

In a bay near Almeria in Southern Spain will be built the world’s first underwater residence for tourists. The hotel will be 40 feet down in the Mediterranean. As all the world opened to tour operators, there was still a frontier behind which lay three quarters of the globe’s surface, the sea; in whose cool depths light fades; no winds blow; there are no stars. There even the most bored travelers could recapture their sense of romance, terror or beauty. For a submerged hotel is such a beautiful idea.

The hotel will cost 170,000 and will be able to accommodate up to ten people a night. Up until now only scientists and professional divers have lived under the sea, but soon, for the first time, the public will be able to go down into the darkness. They will have to swim down in diving suits, but at 40 feet there would be no problem about decompression.

Design of the hotel was crucial. Most of the underwater structures used before had been in the shape of a diving bell or submarine. Professional divers could cope with such things but ordinary people would run the risk of violent claustrophobiA.Then an Austrian architect had the idea of making three interconnecting circular structures, 18 feet in diameter, and looking much like flying saucers. They would be cast in concrete and launched from the shore. Towed into position they would then be sunk. A foundation of cast concrete would already be in place on the sea beD.Pylons would attach the structures to this. Once in position the structures would be pumped dry. The pylons, made to withstand an uplift pressure of 350 tons, would then take the strain.

Cables linking the underwater structures to the hotel on shore would connect it with electricity, fresh water, television, and an air pump, and also dispose of sewage. Entry would be from underneath, up a ladder; because of the pressure inside there would be no need of airlocks or doors.

The first structure would include a changing room and a shower area, where the divers would get out of their gear. There would also be a kitchen and a lavatory. The second structure would contain a dining room/lecture theater, and sleeping accommodation for eight people. The third structure would contain two suites. A steward would come down with the ten customers, to cook and look after them. Television monitors would relay all that went on to the shore so that discussions on the sea bed could be transmitted to all the world.

Around the hotel there are plans to build a strange secret garden, over 100 yards square, of plastic shapes, curves, circles, hollows. This would have a dual function. First, to attract fish who would see it as a shelter and hiding place; secondly, to allow guests looking out of the reinforced windows to see a teeming underwater life.

So far at the site a diving tower 33 feet deep has been installed for diving instruction. An aquarium has been built, and zoologists from Vienna University are in regular attendance to supervise its stocking. There are storage cupboards full of the plastic shapes for the underwater garden and there is a model of the hotel. All that is needed now is permission from the Spanish Government to start building.

What design was finally considered most suitable for the new hotel()

A.three separate circles

B.three linked discs

C.three connected globes

D.three interlocked cylinders