A SCR desulfurization method based on intelligent adjustment of flue gas concentration

Abstract

The invention discloses an SCR desulfurization method based on intelligent adjustment of flue gas concentration, which includes: obtaining the first oxygen sulfide content and the injection amount of the first absorbent of the flue gas at the entrance of the SCR desulfurization reaction zone at the first time; obtaining the second The second oxygen sulfide content of the flue gas at the entrance of the SCR desulfurization reaction zone, and the remaining amount of oxygen sulfide and the remaining amount of absorbent of the flue gas at the outlet of the SCR desulfurization reaction zone; according to the first oxygen sulfide content and the oxygen Calculate the actual desulfurization efficiency of the flue gas by calculating the remaining amount of sulfide; compare the actual desulfurization efficiency with the set desulfurization efficiency, as well as the remaining amount of absorbent and the set escape amount, and perform corresponding correction processing according to the comparison results to obtain the correction coefficient; An absorbent injection amount and a correction coefficient are calculated to obtain a second absorbent injection amount; wherein, the time period between the first time and the second time is when the flue gas flows from the inlet of the SCR desulfurization reaction zone to the SCR desulfurization The required time at the exit of the reaction zone.

Description

technical field [0001] The invention belongs to the technical field of SCR desulfurization, and in particular relates to an SCR desulfurization method based on intelligent regulation of flue gas concentration. Background technique [0002] SCR desulfurization technology is to use the absorbent to chemically react with the oxygen sulfide in the flue gas to achieve the purpose of removing the oxygen sulfide in the flue gas. [0003] In the traditional SCR desulfurization technology, in order to ensure the desulfurization efficiency, according to the concentration or content of oxygen sulfide in the flue gas, the amount of absorbent injected is also different. At present, most of the SCR reactor inlet flue gas data and outlet flue gas data are collected at the same time, and then according to the analysis and comparison of the inlet flue gas data and the outlet flue gas data, the feedback adjustment of the amount of absorbent injection is performed; the above adjustment method ...

AI Technical Summary

Problems solved by technology

At present, most of the SCR reactor inlet flue gas data and outlet flue gas data are collected at the same time, and then according to the analysis and comparison of the inlet flue gas data and the outlet flue gas data, the feedback adjustment of the amount of absorbent injection is performed; the above adjustment method can be used to a certain extent. Improve the desulfurization effect of SCR, but there is still the problem of high control accuracy;

[0004] In the above adjustment method, when calculating the feedback adjustment, the data collected at the outlet of the SCR reactor does not correspond to the data collected at the inlet. For example, for the calculation of desulfurization efficiency, the sulfur content of the flue gas at the outlet is not collected at the same time. The remaining sulfur content of the flue gas at the inlet after desulfurization, so the desulfurization efficiency calculated under the above adjustment method is not accurate, which also affects the accuracy of subsequent adjustments to the amount of absorbent injection

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