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石油密度測定儀的測量意義

发表时间：2020-04-15 15:26作者：得利特

測定石油産品密度在生産、使用及儲運中的重要意義主要有以下幾點:

①用于石油産品的計量。計量時，先測出體積v和密度ρ,然後利用體積與密度的乘積，計算出石油産品的質量。

m=V20（P20-0.0011）

=KVt（P20一0.0011）

式中V20-----標准體積，即20℃時的體積，L或m3

ρ20-----標准密度，g/cm';

K-----石油體積系數，石油在20℃溫度下的體積與在t℃時的體積γ之比值;

0.0011-----空氣浮力修正系數，g/cm3;

Vt-----在t℃时的体积，m3? ?

A1110密度測定仪.jpg

②不同石油産品的密度不同，通过測定密度可大致确定石油产品种类。常见石油产品的标准密度范围如下:

石油産品密度范围/（g/Cm3）

車用汽油0.700-0.760

航空汽油0.730-0.745

噴氣燃料0.775-0.840

輕柴油0.800-0.830

10號航空液壓油0.825-0.830

20號航空潤滑油0.884-0.889

8號噴氣機潤滑油0.866-0.870

汽輪機油0.870-0.890

專用錠子油0.888-0.896

柴油機潤滑油0.880-0.900

汽油機潤滑油0.880-0.900

6號燃料油0.900-0.910

專用燃料油0.950-0.9

③測定石油産品密度可近似地评定石油产品的质量和化学组成情况。在储运过程中如发现石油産品密度明显增大或减小，可以判断可能是否混入了重质油或轻质油。或轻馏分蒸发损失。从化学组成来看，芳烃的密度zui大，环烷烃居中，烷烃zui小，含胶质和沥青质多的石油産品密度也大。

④石油産品密度对燃料油使用性能的影响。发动机功率和燃料消耗率均与燃料密度有关，在油箱容积相同的条件下，燃料密度越大，装人的燃料量就越多，续航能力就越大。但密度过大时，会影响燃料的雾化性和燃烧性，因此，喷气燃料产品标准中对密度都有要求。

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