公开(公告)号：US10124288B2

公开(公告)日：2018-11-13

申请号：US14516682

申请日：2014-10-17

Applicant: FUEL TECH, INC.

Inventor： William H. Sun ,  Fabian Johan Solberg ,  Gerry Carl Snow ,  Steven William Cottingham ,  Vasudeo Shashikant Gavaskar

IPC: B01D53/34 ,  B01D53/50 ,  F23J7/00 ,  F23J15/00

Abstract: Disclosed is a process for controlling injection of magnesium oxide (or precursor) for reducing the concentration of sulfur trioxide in combustion gases from a combustor burning vanadium and sulfur-containing fuel while operating the boiler with enhanced efficiency. In-fuel introduction is combined with mid-temperature introduction, where both can be operated effectively, are found to be of primary importance. When in-fuel introduction will not be effective due to selectivity problems, feed can be shifted to a high-temperature zone. Where the high- or mid-temperature zone cannot be fully utilized due to obstructions for injection or insufficient soot blowers to address fouling of that zone or boiler operational changes to integrate the magnesium oxide injection is insufficient, an entire or a portion of feed can be shifted to the low-temperature zones.

公开(公告)号：US20150107498A1

公开(公告)日：2015-04-23

申请号：US14516682

申请日：2014-10-17

Applicant: FUEL TECH, INC.

Inventor： William H. Sun ,  Fabian Johan Solberg ,  Gerry Carl Snow ,  Steven William Cottingham ,  Vasudeo Shashikant Gavaskar

IPC: B01D53/50 ,  F23J15/00 ,  F23J7/00

CPC classification number: B01D53/346 ,  B01D53/508 ,  B01D2251/402 ,  B01D2251/602 ,  B01D2258/0283 ,  F23J7/00 ,  F23J15/003 ,  F23J2215/20

Abstract: Disclosed is a process for controlling injection of magnesium oxide (or precursor) for reducing the concentration of sulfur trioxide in combustion gases from a combustor burning vanadium and sulfur-containing fuel while operating the boiler with enhanced efficiency. In-fuel introduction is combined with mid-temperature introduction, where both can be operated effectively, are found to be of primary importance. When in-fuel introduction will not be effective due to selectivity problems, feed can be shifted to a high-temperature zone. Where the high- or mid-temperature zone cannot be fully utilized due to obstructions for injection or insufficient soot blowers to address fouling of that zone or boiler operational changes to integrate the magnesium oxide injection is insufficient, an entire or a portion of feed can be shifted to the low-temperature zones.

Abstract translation: 公开了一种控制氧化镁（或前体）的注入，以在燃烧钒和含硫燃料的燃烧气体中降低三氧化硫的浓度，同时以更高的效率操作锅炉。 燃料引入与中温引入相结合，两者都可以有效运行，被认为是最重要的。 当由于选择性问题引入燃料不能有效时，进料可以转移到高温区域。 在高温或中温区域不能充分利用的情况下，由于注入障碍物或不足的鼓风机来解决该区域或锅炉的结垢，使氧化镁注入的整合操作变化不足，可以将全部或部分进料 转移到低温区。