| 摘要 |
A method for measuring alkalihalide content of flue gas. The method comprises generating a light beam (170), wherein the light beam (170) comprises photons having a first wavelength (lambda1), guiding the light beam (170) to a first optical path (160), wherein the first optical path (160) runs through a space (110) containing the flue gas, whereby the light beam (170) is attenuated to an attenuated light beam (175) and detecting a first value indicative of a first intensity (Ik0) of the attenuated light beam (175). The method further comprises generating a light pulse (710), wherein the light pulse (710) comprises photons having a second wavelength (lambda2), dissociating at least part of the alkalihalide molecules (510) on the first optical path (160) to alkali atoms (520) and halogen atoms (525), using the light pulse (710), wherein the light beam (170) is further attenuated to an attenuated light beam (175) by absorption to the alkali atoms (520) on the first optical path (160), detecting a second value indicative of a second intensity (Ik) of the attenuated light beam (175), and determining, using the first value and the second value, the alkalihalide content of the flue gas. Furthermore, a device (990) for measuring alkalihalide content of flue gas by performing the method. Still further, a boiler (100) comprising the device (990). |
