分析了化工设备换热面上碳酸钙碱性污垢生成及其影响因素,认为液体在加热壁面上的过热是导致碳酸钙碱性污垢沉积的重要原因,降低料液在加热壁面上的过热度可收到明显的防垢抗垢效果.在蒸发器加热管内引入少量的惰性气体(载气)与流态化固体颗粒,使之形成气液固三相流载气蒸发,可显著强化传热,降低料液在加热壁面上的过热度.以碳酸钙模拟工业硬水的实验结果表明,气液固三相流载气蒸发过程表现出明显的防垢抗垢效果,且具有一定的在线清洗作用.
参考文献
| [1] | Veenman A W .Heat Transfer in a Multi-Stage Flash/Fluidized Bed Evaporator (MSF/FBE)[J].Desalination,1977(22):55-76. |
| [2] | Kollbach J St;Dahm W;Rautenbach R .Continuos Cleaning of Heat Exchanger with Recirculating Fluidized Bed[J].Heat Transfer Engineering,1987,8(04):26-31. |
| [3] | Hasson D;Perl I .Scale Deposition in a Laminar FallingFilm System[J].Desalination,1981,37(03):279-292. |
| [4] | Cooper M G et al.Microlayer in Nucleate Pool Boiling[J].International Journal of Heat and Mass Transfer,1969,12(08):895-913. |
| [5] | Jamialahmadi M et al.Bubble Dynamics and Scale Formation During Boiling of Aqueous Calcium Sulfate Solution[J].Chemical Engineering Progress,1989,26(01):15-26. |
| [6] | 沈自求 等.一种适于热敏性与易结疤物料浓缩的载气蒸发法[P].CN:85201095.8,1986. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%