烟气排放控制技术的工艺现状

详细描述了LABSORB^TM再生式二氧化硫脱除工艺以及所用的EDV洗涤器设计。FCC装置可由一个简单的工艺采用：EDV洗涤器降低烟气中颗粒和SOx含量，不会引起堵塞或停车。该洗涤器可作为仅处理颗粒的设备(代替ESP)，当以后环保条例更严格时，也能转而处理SOx而不浪费任何组件。该洗涤器可使用LABSORB^TM工艺吸收剂，也可用苛性钠、碳酸钠、氢氧化镁甚至石灰为吸收剂。但二氧化硫含量较高时，LABSORB^TM可再生工艺可大幅度降低操作费用。LABSORB^TM工艺已成功地用于控制硫回收(SRU)装置的尾气排放，并用于控制全世界范围内22个FCC装置的排放，累计处理能力近158000m^3／d(1000000桶／d)。文中介绍用于FCC装置排放控制的苛性钠洗涤、可再生式洗涤以及常见的电除尘器(ESP)应用之间的差别，还详细描述这些系统及其除满足环保要求外的潜在优点。

State of the art in controlling flue gas emission

LABSORB regenerative scrubbing process and EDV scrubber used to control flue gas emissions are de-scribed. The scrubber technology can reduce particulate and SOx within one simple process and without potential for plugging or downtime. The technology can be applied as a particulate only device (instead of an ESP) and then later, as regulations become more stringent, will be converted to also address SOx without wasting any of the components. This scrubber can be used with LABSORB or with caustic, sodium carbonate, magnesium hydroxide or even lime. For high levels of S02 , the LABSORB regenerative process greatly minimizes operating costs. LABSORB has been used successfully for incinerated SRU tail gas cleaning and already installed as emissions control for 22 FCCUs worldwide with an aggregate capacity of nearly 158000 m3/d. The differences between caustic scrubbing, regenerative scrubbing and standard ESP applications for FCCU emissions are discussed. The system is described in detail and the potential benefits beyond meeting regulatory requirements are also analyzed.