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过程工程学报 ›› 2019, Vol. 19 ›› Issue (6): 1153-1159.DOI: 10.12034/j.issn.1009-606X.219146

• 过程与工艺 • 上一篇    下一篇

移动床除尘器捕集颗粒喷动再生的主要操作因素

常 明, 高思鸿, 范怡平*, 卢春喜   

  1. 中国石油大学(北京)重质油国家重点实验,北京 102249
  • 收稿日期:2019-03-05 修回日期:2019-04-10 出版日期:2019-12-22 发布日期:2019-12-22
  • 通讯作者: 范怡平 fanyipin2002@yahoo.com
  • 基金资助:
    石油化工联合基金

Main operating parameters of the spouting regenerator for the collecting particles of the moving bed filter

Ming CHANG, Sihong GAO, Yiping FAN*, Chunxi LU   

  1. State Key Laboratory of Heavy oil, China University of Petroleum (Beijing), Beijing 102249, China
  • Received:2019-03-05 Revised:2019-04-10 Online:2019-12-22 Published:2019-12-22
  • Contact: FAN Yi-ping fanyipin2002@yahoo.com

摘要: 通过对喷动再生操作前后的捕集颗粒进行采样,考察粉尘/捕集颗粒比、提升管气速、颗粒循环量等操作因素对再生效果的影响。结果表明,粉尘/捕集颗粒比、提升管气速、颗粒循环量为影响喷动再生效果的主要操作因素,随粉尘/捕集颗粒比增大、提升管气速增大、颗粒循环量减小,粒级效率增大;喷动再生器在提升管气速较高时,再生效率较高,但若提升管气速过高,捕集颗粒同样会随灰尘一起被带出;喷动再生过程不可避免地造成捕集颗粒的磨损,合适的提升管气速对整个喷动再生系统至关重要,一般为捕集颗粒带出速度的1.1?1.3倍。

关键词: 移动床, 捕集颗粒, 喷动再生, 粉尘-捕集颗粒比, 提升气速, 循环量, 磨损

Abstract: The combustion of fossil fuel inevitably results in serious environmental pollutions such as discharging flue gas containing SO2, NO2 and CO2. Thus, efficient flue gas purification techniques, especially for the high-temperature gas purification process, are required to protect the environment as well as the downstream units. The moving bed filter is undoubtedly one of the most effective ways to high-temperature dedust. The collecting particles in moving bed filter are usually anticipated to be used recycling, thereby an effective regenerating method for the collecting particles is particularly needed. In this work, the spouting regenerating for the collecting particles of the moving bed filter was investigated. Therefore, it was necessary to determine the main operating parameters of the spouting regenerator for the collecting particles of the moving bed filter. The experimental research on the regenerating efficiency of the regenerator with the collecting particles containing dust was carried in a large plexiglass cold model experimental setup. The dust-collecting particles mixture was sampled both in the spent collector inclining tube and regenerating inclining tube under different operating conditions. These effects of the operating parameters including the dust/collecting particle ratio, the gas velocity and the circulating particle flux on the regenerating efficiency were investigated, respectively. Besides, the abrasion of collecting particles in the spouting bed was measured. On the other hand, the particle size variation during the regenerating process was also analyzed. By measuring the particle size distribution and the mass frequency of the sampled mixture, the corresponding regenerating efficiency under different operating conditions was obtained. It was found that, the dust/collecting particle ratio, the gas velocity and the circulation flux were all the key operating parameters for regenerating. Increasing the dust/collecting particle ratio and the gas velocity were beneficial to the regenerating efficiency, while increasing the circulating particles flux resulted in an opposite effect. Moreover, the spouting regenerator can achieve the high separation efficiency under the condition of high lifting gas flow velocity. If the gas velocity was too high, the collecting particles would also be brought away with the dust and sequentially, the magnitude of the collecting particles decreased. The spouting regenerating process inevitably led to the collecting particles abrasion and thus a suitable gas velocity was quite vital for the whole regenerating system. Based on the experimental results, the recommended gas velocity was generally 1.1?1.3 times that of the collecting particles.

Key words: moving bed, collecting particle, spouting regenerating, dust-collecting particle ratio, gas velocity, circulating particle flux, abrasion