| 摘要 |
<p>A process and apparatus for maintaining the uniform moisture content in a continuously conveyed batch of porous materials is described. The porous material is continuously fed through a treatment tank, wherein it is contacted with a liquid to be absorbed therein. The moisture content of the material is continuously monitored as a direct function of the combined weight of the material and the treatment tank to generate error or correction signals, as compared to the uniform weight (moisture content) desired. The control or error signals are utilized to vary the dwell times(up or down) of the porous material in the treatment tank. By varying the dwell times the porous material is contacted by the treating liquid for either larger or shorter periods until the weight of the tank and material therein returns to the uniform weight desired. Thus, the moisture content of the porous material is continuously adjusted to substantially maintain a uniform standard.</p> |
