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ZXIII型双网浓缩机
编号 : 008
知识产权 : 国家发明专利
产品详情

ZXIII型双网浓缩机 (国家发明专利技术)

该设备的工作原理系利用双网夹住纸浆环绕第一个脱水辊时产生的张力对纸浆进行初步挤压脱水,初步脱水后的纸浆在双网带动下再进入下一个直径相对较小的脱水辊按照第一个脱水辊的脱水方式进行第二次挤压脱水,由于脱水压力P=  网张力F  / 脱水辊半径R,所以,第二个脱水辊上的纸浆受到了更大的挤压力。更为主要的是,在第二个脱水辊受压面的尾部,设置有一根上压榨辊,对处于挤压状态下的纸浆施加更为强大的压榨力,这种强大压榨力若没有双网张紧产生的挤压力的存在,会足以压溃(压花)纸浆,也就是说,正是因为在压榨辊之前存在着网子张力产生的挤压力,使得纸浆可以承受更大的多的压榨力,从而可以大大提高成浆干度至45-50%以上,而普通的双网多辊压榨机由于存在浆层被压溃的风险,所以要采用多道压榨辊串联压榨脱水,逐步提高浆层水分,从而逐步提高浆层的耐压溃能力,即使是这样,其最后一道的线压力也会低得多,而且由于多道压区的存在,动力消耗和网子的消耗量都要高得多。而ZXII型普通双网浓缩机尽管有多达四个以上的可产生挤压力的脱水辊,但这种挤压力的大小无法和压榨产生的压榨力相比,由于它有脱水时间长的优势,最后成浆干度也只能达到35%左右,很难超过40%,尽管它的动力消耗是所有这几类浓缩机中最低的。第三点是ZXIII型设备在压榨前由于这种挤压力的存在会大大减少普通压榨所普遍存在的回湿现象。

    

ZXIII Twin Wire Press Washer

- National Invention Patent

The operation principle of this device is to take advantage of the tension generated by twin wire winding on first dewatering roller for initial pulp dewatering, the pulp then be sent to next dewatering roller with smaller diameter by the twin wire for next dewatering process which is same as initial dewatering process. Since P (dewatering pressure) = F (wire tension) / R (diameter of roller), the pulp on second roller receives greater extrusion force. Moreover, at tail of second roller configures a upper press roller, which exerts greater extrusion force on pulp subject to extrusion. This great extrusion force would have crushed the pulp if there is no tension generated by twin wire. Thanks to the tension of twin wire that the pulp layer can bear greater extrusion force, which increase dryness of pulp to above 45-50%.

The conventional twin wire press roller, in order to avoid crush of pulp layer, has to adopt multiple press rollers in cascade arrangement for dewatering. Water content is gradually increased to enhance the anti-crush ability of pulp layer. Even though, the linear pressure at the last roller is relatively much lower. Owing to several press section, power and wires consumption is much bigger。

The ordinary ZXII type though has more than four dewatering rollers which generate tension of twin wire, the extent of tension cannot compare with the extrusion of press roller, despite its long dewatering time, the dryness can only be around 35% and hardly to be over 40%。 The ZXII beat other conventional devices on its lowest power consumption among these devices。

Thanks to the tension of twin wire before press section, ZXIII series is much less to have wetting problem which is commonly happened in conventional press washer.

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