壓縮空氣飽和含水量與壓力成反比，即工作壓力越低，吸干機(jī)的濕度負(fù)荷越大，因此要求的再生氣量也大。

Compressed air saturated water content is inversely proportional to the pressure, that is, the lower the working pressure, the greater the humidity load of the dryer, so the required regeneration gas is also large.

從干燥機(jī)的結(jié)構(gòu)我們知道，再生空氣是由孔板或球閥的開啟度和兩側(cè)的壓力差決定的。在流通面積一定的情況下，流經(jīng)孔板或球閥的再生氣量與壓力成正比，工作壓力的下降會導(dǎo)致再生氣量的減小從而使吸干機(jī)再生效率降低，影響吸附效率。

From the structure of the dryer, we know that the regeneration air is determined by the opening degree of the orifice or ball valve and the pressure difference on both sides. In the circulation area, flows through the orifice valve or the regeneration air flow is proportional to pressure, working pressure decrease will lead to reduced regeneration gas so that the dryer regeneration efficiency decreased, affecting the adsorption efficiency.

壓縮空氣的體積與壓力成反比，較低的工作壓力使壓縮空氣空塔流速提高，吸附劑與壓縮空氣的接觸時(shí)間縮短，導(dǎo)致動(dòng)態(tài)吸附容量的下降。

The volume of compressed air is inversely proportional to the pressure, and the working pressure of the compressed air increases the velocity of the compressed air, and the contact time between the adsorbent and the compressed air is shortened, which leads to the decrease of the dynamic adsorption capacity.

由于壓力下降、空塔流速提高，導(dǎo)致吸附床層的壓力損失加大。 因此工作壓力降低必然引起產(chǎn)品氣出口露點(diǎn)上升、再生氣量加大、壓力降上升。

The pressure loss of the adsorbent bed is increased due to the decrease of the pressure and the increase of the air velocity. Therefore, the decrease of working pressure will inevitably lead to the increase of the dew point of the gas outlet, the increase of the regeneration gas and the increase of the pressure drop.