• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Pulping engineering and environmental recycling sustainability conference >Scale Formation in Induced Draft Booster Fan of a Sulfite Pulp Mill
【24h】

Scale Formation in Induced Draft Booster Fan of a Sulfite Pulp Mill

机译：亚硫酸盐纸浆厂引风机引风机中的水垢形成

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Pulp and Paper mills burn the spent pulping liquor in a boiler to recover pulping chemicals and to generate steam for energy recovery. At the sulfite mill in this study, there are multiple steps for flue gas treatment: condensers, ammonia scrubbers to remove SO_2 and generate pulping liquor, and caustic scrubbers for SO_2 removal. An induced draft (ID) booster fan is between the ammonia and caustic scrubbers. There is significant scale formation on the ID booster fan blades. This can cause fan vibration that is severe enough that the boiler needs to be shut down to clean the booster fan. This leads to both maintenance costs and lost revenue due to lost pulp production. Steps to determine the scaling mechanism include both mill measurements and laboratory studies. Mill measurements include deposit probe sampling, gas sampling and analysis of liquid samples from the scrubber systems. Analysis of scale samples by XRD and wet chemical methods show that the primary compound in the scale are the double salt (NH_4)_2Mni(SO_4)_3 with significant amounts of (NH_4)_2SO_4 and CaSO_4 incorporated in the scale. Formation and crystallization of (NH_4)_2Mn_2(SO_4)_3 from NH_3 scrubber solution carryover and particulate matters appears to be the root cause of scale formation. Crystallization tests with mills samples and model salt solutions were carried out to clarify the likely mechanism.
机译：制浆造纸厂在锅炉中燃烧废制浆液，以回收制浆化学品并产生蒸汽以回收能量。在本研究的亚硫酸盐厂中，烟气处理有多个步骤：冷凝器，用于除去SO_2并产生制浆液的氨洗涤塔，以及用于除去SO_2的苛性洗涤塔。引风机（ID）增压风扇位于氨气和苛性洗涤塔之间。内径增压风扇叶片上形成明显的水垢。这可能会导致风扇振动严重到需要关闭锅炉以清洁增压风扇的程度。由于纸浆生产损失，这将导致维护成本和收入损失。确定缩放比例机制的步骤包括工厂测量和实验室研究。工厂的测量包括沉积探针采样，气体采样和洗涤塔系统中液体样品的分析。通过XRD和湿化学方法对水垢样品进行分析表明，水垢中的主要化合物为复盐（NH_4）_2Mni（SO_4）_3，其中有大量的（NH_4）_2SO_4和CaSO_4掺入。由NH_3洗涤塔溶液中的残留物形成和结晶（NH_4）_2Mn_2（SO_4）_3和颗粒物似乎是水垢形成的根本原因。用工厂样品和模型盐溶液进行了结晶测试，以阐明可能的机理。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号