N

新闻资讯

ews center

  • 有哪些因素影响布袋除尘器腐蚀?
  • 本站编辑:江西泽川环保科技有限公司发布日期:2019-09-27 16:55 浏览次数:

降低布袋除尘器的漏风率。漏风是除尘器腐蚀的主要原因之一,漏风量与除尘器内的负压密切相关,负压越大,漏风将越加严重。所以湿法窑应使布袋除尘器正压运行,即将排风机放在除尘器的进口。正压操作对布袋除尘器的性能不会带来不利的影响,但粉尘容易进入除尘布袋内部,所以要改善其密封结构。另外正压操作会加速排风机的磨损,不过国内许多湿法窑的立式布袋除尘器都是采用正压操作,风机磨损过快现象并不十分明显。加强除尘系统的密封这一措施包括除尘器本身和除尘系统中其他设备和管道的密封。

Reduce the air leakage rate of bag filter. Air leakage is one of the main causes of dust collector corrosion. The amount of air leakage is closely related to the negative pressure in the dust collector. The greater the negative pressure, the more serious the air leakage will be. Therefore, the wet kiln should make the bag filter run under positive pressure, that is, the exhaust fan should be placed at the entrance of the dust collector. Positive pressure operation has no adverse effect on the performance of bag filter, but dust easily enters the inside of bag, so its sealing structure should be improved. In addition, positive pressure operation will accelerate the wear of exhaust fans, but many vertical bag dust collectors in domestic wet kilns are operated under positive pressure, and the phenomenon of excessive wear of fans is not very obvious. The measures to strengthen the sealing of the dust removal system include the sealing of the dust collector itself and other equipment and pipes in the dust removal system.

除尘器本身密封性的好坏主要取决于壳体。要使壳体保持良好的密封性,必须保证其制造和安装质量。壳体所有连接处都要连续焊,焊缝要用煤油渗透法进行检查。防爆门和人孔门处容易漏风,好采用双层人孔门,门周边的密封要采用耐热硅橡胶。此外,还要改进窑尾密封圈的结构,加强冷烟室检查孔和人孔门的密封,因为这些部位都处于负压下,密封不良也会漏入大量的冷风。除尘骨架尽量减少主机开停和除尘器中断电、供电的次数特别是烘干机,一般生产能力较大,不得不间歇运行。有的水泥厂烘干机要轮流烘干多种物料,更增多了开停的次数。由于开停频繁,除尘器内的体温度每天不止一次地降到露点以下。在主机停止运行时,应对除尘器进行保温,同时排灰装置要继续运行,直到灰斗的积灰排空为止。而且要调整生产计划,尽量将停机次数和停机时间压缩到低限度。

The sealing performance of the dust collector itself depends mainly on the shell. In order to keep the shell well sealed, the quality of manufacture and installation must be guaranteed. All joints of the shell shall be welded continuously, and the welds shall be inspected by kerosene penetration method. Explosion-proof doors and manhole doors are easy to leak. Double-layer manhole doors are preferable. The sealing around the doors should be made of heat-resistant silicone rubber. In addition, the structure of sealing ring at kiln end should be improved, and the sealing of check holes and manhole doors in the cold smoke chamber should be strengthened, because these parts are under negative pressure, and a lot of cold air will leak into the poor sealing. Dust removal skeleton minimizes the number of main engine start-up and shut-down and power outage in the dust collector, especially the dryer, which generally has a large capacity and has to run intermittently. Some cement dryers take turns drying a variety of materials, increasing the number of start-up and shut-down. Due to frequent start-up and shutdown, the body temperature in the dust collector drops below dew point more than once a day. When the main engine stops running, the dust collector should be insulated, and the ash removal device should continue to operate until the ash hopper is emptied. Moreover, we should adjust the production plan and try our best to reduce the number of downtime and downtime to a low limit.