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升流式压力筛-Upflow pressure screen

升流式压力筛-Upflow pressure screen

产品属性

  • 所属分类:筛选设备系列
  • 产品编号:1566353468
  • 浏览次数:0
  • 发布日期:2019-08-29
  • 产品概述
  • 性能特点
  • 技术参数


概述


 

升流压力筛是我厂消化吸收进口样机技术研制开发的一种新型再生纸浆料筛选设备。该设备针对再生纸浆中杂质的特性设计为升流结构。可广泛应于各种废纸浆的粗筛选及纸机

前浆料的筛选,具有无可比拟的良好工作性能和可靠性,是各种国产压力筛用于再生浆处理的更新换代产品.

Upflow pressure screen is a new type of screening equipment for recycled pulp developed by our factory by absorbing imported prototype technology. The equipment is designed for upflow structure according to the characteristics of impurities in recycled pulp. It can be widely used in the rough screening of various waste pulps and the screening of pulps before paper machines. It has incomparable good performance and reliability. It is a renewal product of various domestic pressure sieves for the treatment of regenerated pulp.


 

 工作原理


 

众所周知,再生纸浆中的杂质分轻杂质和重杂质两部分。传统型压力筛由上部进料。低部排渣,轻杂质都通过整个筛浆区。当处理化学浆时,因浆中杂质的比重和质量一般都大于单根纤维。这种结构有利于减少杂质在设备内的停留时间,但当处理再生纸浆这种含有大量比重较小的的轻杂质时,就会大大延长轻杂质在设备内的停留时间,而造成筛选效率的下降和加大转子同筛鼓的磨损甚至损坏。

压力筛采取底部进浆,底部排重渣、顶部排轻渣的升流式结构设计,可有效地解决上述问题。轻杂质与浆料中的空气自然上升到顶部排口排出,重杂质一进入机体即可沉降到底

部排出。这样一方面有效地缩短了杂质在筛区内的停留时间,降低杂质循环的可能性,提高了筛选效率。另一方面防止重杂质对转子和筛鼓造成的损坏,延长设备的使用寿命。

Working principle

As we all know, impurities in recycled pulp are divided into two parts: light impurities and heavy impurities. The traditional pressure screen consists of upper feed and low slag discharge. Light impurities pass through the entire sieve zone. When chemical pulp is treated, the specific gravity and mass of impurities in pulp are generally larger than that of single fiber. This structure helps to reduce the residence time of impurities in the equipment, but when the recycled pulp contains a large number of light impurities with a small proportion, it will greatly prolong the residence time of light impurities in the equipment, resulting in the decrease of screening efficiency and increase the wear and even damage of the sieve drum and the rotor.

This problem can be effectively solved by adopting the upflow structure design of bottom pulp feeding, bottom weight slag discharging and top light slag discharging. Light impurities and air in the pulp rise naturally to the top outlet and discharge, heavy impurities can settle to the bottom of the body and discharge as soon as they enter. On the one hand, it effectively shortens the residence time of impurities in the screen area, reduces the possibility of impurity circulation, and improves the screening efficiency. On the other hand, it prevents the damage caused by heavy impurities to the rotor and sieve drum, and prolongs the service life of the equipment.


 

结构性能


 

1. 筛鼓:精筛筛鼓筛缝宽度0.12mm,使用波纹棒条筛鼓,形成无毛刺槽口,不会像机械洗磨槽口产生毛刺及槽端裂缝。并可提供硬质镀铬工艺以提高抗磨损性能。

2. 旋翼转子:转子采用鼓式外装弧形片结构,并校正动平衡。通过水力脉冲对筛鼓进行清洗。这种结构可防止杂质缠饶转子,影响设备正常运转。

3.外壳;由上盖和筒体组成,筒体下部设有切向进浆管,筒体中上部设有出浆管,上盖有排渣口及冲洗水口。

4. 传动装置;包括电机,皮带轮,V型带。皮带张紧装置,主轴及轴承。

Structure performance


1. Screen drum: The width of screen slot of fine screen drum is 0.12mm. Using corrugated bar screen drum, no burr groove is formed. It will not produce burr and crack at groove end like mechanical washing and grinding groove. The hard chromium plating process can be provided to improve wear resistance.

2. Rotary-wing rotor: the rotor adopts drum type external arc piece structure, and the dynamic balance is corrected. The sieve drum is cleaned by hydraulic pulse. This structure can prevent impurities from winding up the rotor, affecting the normal operation of the equipment.

3. Shell: It is composed of an upper cover and a cylinder body. The lower part of the cylinder body is provided with a tangential pulp feeding pipe, the upper part of the cylinder body is provided with a pulp outlet, and the upper cover is provided with a slag discharge port and a flushing water outlet.

4. Transmission device: including motor, belt pulley, V belt, belt tension device, spindle and bearing.


 


 

 (一)特点


 1. 下部进浆,上部出浆避免管路交叉。

2. 沉稳的底座开放式设计,便于维护和更换皮带、皮带轮和定位螺栓

3. 大功率传动和密封装置可整体装卸,减少维修停机时间。

4. 筛鼓和转子清洗,调节,检查和拆卸均很方便。

5. 可配用各种类型筛鼓。如平纹。波纹筛鼓等。

6. 根据浆料性质可配用各种形式的转子。

7. 最大操作压力设计为875Pa,可满足各种应用条件。

Ⅰ Characteristics

1. The lower part is used for pulp inlet, and the upper part is used for pulp outlet, so as to avoid pipeline crossing.

2. A stable base open design for easy maintenance and replacement of belts, pulleys and positioning bolts.

3. The power transmission and sealing device can be loaded and unloaded as a whole to reduce maintenance downtime.

4. Screen drum and rotor cleaning, adjustment, inspection and demolition are very convenient.

5. Various types of sieve drum can be used. Such as plain weave, corrugated sieve drum and so on.

6. According to the properties of pulp, various forms of rotor can be used.

7. The maximum operating pressure is designed to be 875Pa, which can meet various application conditions.


(二)优点


1. 采用缝宽为0.12㎜的精筛筛鼓,设置在粗筛之后,能有效去除浆中细小杂质及尺寸大于200um的油墨粒子,尤其是对浆中胶粘物的去除率可达到90%以上,是目前国内外最为推

荐的代替各种热分散设备的最新技术方法(关于缝筛筛选法同热分散解决胶粘物问题的比较祥见华南理工大学制浆造纸工程国家重点实验室陈嘉翔教授撰写的刊登在《纸和造纸》2000年第三期:“缝筛代替分散机在废纸系统的应用”一文)

2.  重杂质排入筛底部的重杂罐,防止与转子和筛鼓磨擦造成设备损伤,减少停机时间

3. 轻杂质和空气从顶部尾浆出口迅速排出。

4. 筛选效率高。杂质在筛区停留时间短,显著降低杂质循环的可能性

5.  所需进浆压力低

Ⅱ Advantages

1. The fine sieve drum with 0.12mm slot width can effectively remove fine impurities in pulp and ink particles larger than 200 um after coarse sieve. Especially, the Stickies Removal Rate in pulp can reach more than 90%, which is currently the most recommended technology to replace all kinds of thermal dispersion equipment at home and abroad (the comparison of seam screening method and thermal dispersing method to solve sticky stickies are published in the third issue of "Paper and Paper Making" in 2000 by Professor Chen Jiaxiang, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology: "Seam screening replaces dispersing machine in waste paper system" .

2. Heavy impurities are discharged into the heavy impurities tank at the bottom of the screen to prevent equipment damage caused by friction with the rotor and screen drum and reduce downtime.

3. Light impurities and air exits rapidly from the top outlet of tail pulp.

4. High screening efficiency. The short residence time of impurities in the sieve area significantly reduces the possibility of impurity cycling.

5. Low pulp pressure required.


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