Regenerated flue gas dechlorinating agent and preparation method thereof

Abstract

The invention discloses a regenerated flue gas dechlorinating agent and a preparation method thereof. The dechlorinating agent is prepared from the following components in percentage by mass: 35%-65% of active components, 10%-35% of auxiliaries, 15%-25% of adhesives and 5%-10% of pore-forming agents. According to the regenerated flue gas dechlorinating agent, the active components are set as one or more of copper oxide, manganese oxide, magnesium carbonate and calcium hydroxide, the types of the active components is enrichsed, the loss speed of the active components is slow when the active components are mixed to prepare the dechlorinating agent, the service life of the dechlorinating agent is prolonged, the new dechlorinating agent preparation method is adopted, after the dechlorinating agent preparation is completed, the whole structure of the dechlorinating agent is stable, and during the use, the dechlorinating agent has the characteristics of high temperature resistance, high water content, high oxygen content and high CO2 content, so that the dechlorinating agent can adapt to the characteristics of the environment when being used in regenerated flue gas, and the using effect of the dechlorinating agent is better and more obvious.

Description

technical field [0001] The invention belongs to the technical field of dechlorination agents, and in particular relates to a regenerated flue gas dechlorination agent and a preparation method thereof. Background technique [0002] In the continuous reforming process of UOP and Axens, the dechlorination methods in the regeneration flue gas include alkali washing method and Chlorsorb chlorine adsorption method. At present, the shortcomings of the alkaline cleaning method are: 1) high investment in equipment and complicated operation; 2) with the increase of the operating time of the device, the dechlorination effect is not good, and the equipment in the regeneration circuit is easy to corrode, which affects the activity of the catalyst; Alkaline sewage is difficult to treat. Compared with the alkaline washing method, the Chlorsorb chlorine adsorption method reduces the usage of the chlorinating agent tetrachlorethylene, avoids the generation of alkali-containing sewage, and g...

AI Technical Summary

Problems solved by technology

At present, the shortcomings of the alkaline cleaning method are: 1) high equipment investment and complicated operation; 2) with the increase of the operating time of the device, the dechlorination effect is not good, and the equipment in the regeneration circuit is easy to corrode, which affects the activity of the catalyst; Alkaline sewage is difficult to treat

However, according to the use of the refinery, since chlorine adsorption itself is an exothermic reaction, if the inlet temperature is not well controlled, the outlet temperature of the adsorption zone will be high, and the adsorption effect of the catalyst will become poor, which will easily cause the chlorine content in the vented air to exceed the standard.

At the same time, due to the high water vapor content in the vented air, if the operating temperature of the separation hopper is low and the water vapor dew point temperature under the operating pressure, the separation hopper will be severely corroded

[0003] In order to solve the problems caused by the above dechlorination methods, a high-temperature dechlorination agent can be used to dechlorinate the regenerated flue gas. However, the dechlorination agent currently used in the regenerated flue gas has few active components, which leads to dechlorination during the dechlorination process. The loss of active components is fast. At the same time, in the process of preparing the dechlorination agent, the current preparation method is cumbersome, more impurities are produced in the preparation process, and the stability of the dechlorination agent produced in the preparation cannot be guaranteed in the regeneration flue gas. Finally, after the existing dechlorination agent is prepared, its penetration chlorine capacity is small and its adaptable range is narrow