公开(公告)号：US3894145A

公开(公告)日：1975-07-08

申请号：US39847373

申请日：1973-09-18

Applicant: TSUKISHIMA KIKAI CO

Inventor： MORITA MINORU ,  HASEGAWA MASUO ,  KAMIJO YASUHIKO

IPC: B01D53/50 ,  C01B17/04 ,  C01B17/05

CPC classification number: B01D53/501 ,  C01B17/0404 ,  C01B17/05

Abstract: An improved process for desulfurization of waste gas emitted from, for example, various boilers. Five steps, namely, (1) the step of absorption of waste gas, (2) the step of pyrolysis, (3) the step of recovery and recycle of products, (4) the step of recovery of sulfur and (5) the step of recycle of by-products formed in the step (4), are included. As a further preferred embodiment, excesssive fuels are supplied in the step of pyrolysis (2) to generate a mixed gas, which is subjected to desulfurization in the step of removal of sulfur (4) and then utilized for heating the wet desulfurized gas coming out of the step of absorption (1). This process represents an improvement over the conventional process particularly in respect of the loss of alkali metals which can be minimized because they are recycled in the process.

Abstract translation: 从例如各种锅炉排放的废气脱硫的改进方法。 五个步骤，即（1）吸收废气的步骤，（2）热解步骤，（3）产品回收和再循环的步骤，（4）回收硫的步骤和（5） 包括在步骤（4）中形成的副产物的再循环步骤。 作为进一步优选的实施方案，在热分解步骤（2）中提供过量燃料以产生在除去硫（4）的步骤中进行脱硫的混合气体，然后用于加热出来的湿脱硫气体 的吸收步骤（1）。 该方法代表了对常规方法的改进，特别是在碱金属的损失方面，由于在该方法中循环使用碱金属，所以可以将其最小化。