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提问人:网友dd659311 发布时间:2022-01-07
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硅胶silica gel()

A、主要成分为SiO2,颗粒状硅胶有坚硬的玻璃状的外表。Mainly composed of SiO2, granular silica gel has a hard glass appearance

B、对极性物质的选择性很强。Strong selectivity to polar substances

C、适当的条件下,可使气体露点达-60℃~-70℃。Under appropriate conditions, the dewpoint of gas can reach -60℃ ~ -70℃

D、相对湿度大时,吸附容量(占干基的百分比)高。Adsorption capacity (as a percentage of dry base) is high when relative humidity is high

E、但遇液态水极易炸裂,产生粉尘。But in the presence of liquid water, it is easy to burst and produce dust

F、压降大,有效湿容量低。High pressure drop and low effective wet capacity

G、一般残余水量6%,在再生温度下不能脱除。Generally, the residual water content is 6%, which cannot be removed at the regeneration temperature

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更多“硅胶silica gel()”相关的问题
第1题
思科泰区间中继台电源远供电压为450V,规定每对芯线最多可带()台区间中继台,超过H后。区间中继台需增加一对芯线。

A. 5

B. 6

C. 12

D. 20

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第2题
【单选题】Pregel系统中Master的作用不包括()。

A、维护worker

B、恢复workers产生的错误

C、提供Web-UI监督工作进程工具

D、与worker交流

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第3题
gelretardation凝胶阻滞
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第4题
Pulsed -field gel electrophoresis uses a strong electric field to separate very long DNA molecules, stretching them out so that they travel end-first through the gel at a rate that depends on their length.
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第5题
作为天然气脱水的固体吸附剂应具备下列条件As a solid adsorbent for natural gas dehydration, the following conditions should be met:()

A、比表面积大,吸水量大Large specific surface area, large water absorption

B、选择吸附好Selective adsorption

C、容易再生和重复使用Easy to regenerate and reuse

D、机械强度高,使用寿命长High mechanical strength, long service life

E、无毒,无腐蚀性Non-toxic, non-corrosive

F、价格便宜Cheap price

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第6题
固体干燥剂吸附脱水:是利用多孔性的干燥剂吸附天然气中的水蒸气。固体干燥剂很多,天然气工业上常用的有()等。Solid desiccant adsorption dehydration: is the use of porous desiccant adsorption of water vapor in natural gas. There are many solid desiccant, silica gel, activated alumina, bauxite and molecular sieve are commonly used in the natural gas industry.

A、硅胶

B、活性氧化铝

C、铝矾土

D、分子筛

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第7题
活性氧化铝activated aluminium oxide()

A、主要组分为部分水化的、多孔的和无定形的氧化铝,并含有少量其他金属化合物。The main groups are partially hydrated, porous and amorphous alumina, and contain small amounts of other metallic compounds

B、湿容量比铝钒土高The wet capacity is higher than that of aluminum-vanadium soil

C、干燥后气体露点可达-73℃After drying, the gas dew point can reach -73℃

D、再生时耗热量大It takes a lot of heat to regenerate

E、能吸附重烃,且再生时不易除去It can adsorb heavy hydrocarbon and is not easy to remove during regeneration

F、呈碱性,可与无机酸发生化学反应,因此,不宜处理酸性天然气。It is alkaline and can react with inorganic acids, so it is not suitable to deal with acidic natural gas

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第8题
天然气液体脱水剂应具有下述条件Natural gas liquid dehydrating agent shall have the following conditions:()

A、吸湿性能好Good moisture absorption

B、烃类在脱水剂中溶解度小Hydrocarbons are less soluble in dehydrating agents

C、容易再生重复使用Easy to reuse

D、蒸汽压低(携带损失小),粘度小Low vapor pressure (small carrying loss), low viscosity

E、不易和天然气组分发生化学反应Does not react easily with natural gas components

F、无腐蚀性non-corrosiveness

G、价格低low price

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第9题
分子筛显著特点Molecular sieve features:()

A、具有很好的吸附选择性It has good adsorption selectivity

B、如用于脱水的3Å、4Å分子筛For example, 3A and 4A molecular sieves used for dehydration

C、3Å分子筛:只允许H2O(2.3-3.1Å)、CH4等直径小于3Å的分子进入孔道(不吸附C2+烃)3A molecular sieve: only H2O (2.3-3.1a), CH4 and other molecules with diameter less than 3A are allowed to enter the pore (C2+ hydrocarbon is not adsorbed)

D、4Å分子筛:只允许H2O(2.3-3.1Å)、CH4 、 C2H6 等小于4Å的分子进入孔道(不吸附C3+烃)4A molecular sieve: only H2O (2.3-3.1a), CH4, C2H6 and other molecules less than 4A are allowed to enter the pore (C3+ hydrocarbon is not adsorbed)

E、3Å、4Å分子筛有利于从烃类气体中选择性吸收水分,而5Å则允许各种直链烷烃进入孔道吸附,故用于脱水选择性较差。 Molecular sieves 3A and 4A are favorable for selective absorption of water from hydrocarbon gases, while 5A allow various straight-chain alkanes to enter channels for adsorption, so they are less selective for dehydration.

F、具有很高的吸附性能It has high adsorption properties

G、很低的水汽分压,高温、高气体线速度等较苛刻条件下,仍保持较高的湿容量(其内部比表面积600~1000m2/g,大于一般吸附剂)。Low partial pressure of water vapor, high temperature, high gas linear velocity and other harsh conditions, still maintain a high wet capacity (its internal specific surface area of 600 ~ 1000m2/g, greater than the general adsorbent)

H、湿容量随温度变化小,在较高温度下仍有高吸附能力,实际使用时虽然经过反复再生,仍可以基本保持不变。The moisture capacity changes little with the temperature, and it still has a high adsorption capacity at a higher temperature. In practical use, it can remain basically unchanged despite repeated regeneration.

I、具有很高的脱水能力,对天然气水露点可降至-98℃,适用于天然气深冷法轻烃回收与液化前深度脱水。It has a very high dehydration capacity, and the dew point of natural gas water can be reduced to -98℃, which is suitable for deep dehydration before natural gas cryogenic light hydrocarbon recovery and liquefaction.

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第10题
脱水流程dewatering process flow操作工艺参数Operating process parameters:()

A、吸附操作温度:一般<50℃,否则降低吸附剂的去湿能力。adsorption operating temperature: generally otherwise reduce the adsorbent dehumidification> B、吸附操作压力:压力对吸附剂去湿能力影响很小,但应避免压力波动而影响床层的稳定性。Adsorption operating pressure: the pressure has little effect on the desiccant ability of the adsorbent, but the stability of the bed should be avoided due to the pressure fluctuation.

C、吸附剂寿命:决定于吸附剂种类和操作情况,一般1~3年。Adsorbent life: depends on the type of adsorbent and operating conditions, generally 1 to 3 years.

D、再生温度:取决于吸附剂种类,分子筛再生温度200~300℃。Regeneration temperature: depending on the type of adsorbent, the regeneration temperature of molecular sieve is 200 ~ 300℃.

E、再生气流量:约为气体流量的5~15%,太小不足以在规定的时间内把吸附剂提高到规定温度,太大容易使床层松动,降低吸附剂寿命。Gas flow rate: about 5 ~ 15% of the gas flow rate, too small to raise the adsorbent to the specified temperature within the specified time, too large will easily loosen the bed and reduce the life of the adsorbent.

F、冷却终了温度:约50℃。Cooling end temperature: about 50℃.

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