Denitration agentcapsule and preparation method and application thereof

Abstract

The invention provides a denitration agent capsule and a preparation method and application thereof. The denitration agentcapsule comprises a capsule shell and a denitration agent wrapped in the capsule shell; the denitration agent is prepared by mixing effective agent components and a binder; the mass fraction of the effective agent component is 91-99 wt% of that of the denitration agent, and the mass fraction of the binder is 1-9 wt% of that of the denitration agent; the total mass percentage of the effective agent component and the binder is 100 wt% of the denitration agent. The denitration agent capsule can smoothly reach the interior of a rotary kiln, a shaft kiln, a Maerz kiln, a sleeve kiln or a melt separation furnace, so that the denitration agent capsule is completely mixed with raw materials, the denitration agent capsule is conveyed to the optimal temperature area of denitration agent reaction through a feeding system, the internal denitration agent is released after the capsule shell is melted, and the denitration effect in combustion is achieved.

Description

technical field [0001] The invention belongs to the technical field of flue gas denitrification, and relates to a denitrification agent capsule, in particular to a denitrification agent capsule and a preparation method and application thereof. Background technique [0002] In the industry of volatilization and enrichment of valuable metals in rotary kilns, denitrification technology in kilns has always been a difficult problem. Due to the particularity of the dust in the process of this industry, such as high content of heavy metals, high sulfur, and strong corrosion, and the recovery of valuable metals by dust collectors, the temperature of the flue gas should be kept stable and low. [0003] At present, there are mainly the following methods for rotary kiln denitrification: (1) Optimizing operation and stable working conditions: combining with its own raw materials, conducting detailed chemical composition and physical performance analysis to ensure the balance and homogen...

AI Technical Summary

Problems solved by technology

[0005] The above patents all disclose a denitrification system. In the denitrification process of the rotary kiln, in addition to adding a denitrification agent, a denitrification system is also required. The operation of the denitrification process is complicated, and the difficulty of denitrification is increased, and the cost of denitrification is increased.

[0006] Therefore, to provide a rotary kiln denitrification method with high denitrification efficiency, low operating cost, simple operation and effective control of NOx emission concentration has become one of the urgent problems in this field.