Anti-crystallization ammonium carbamate denitration agent pyrolysis box

By designing an ammonium carbamate denitrification agent pyrolysis box to prevent crystallization and using double-sided heating components to ensure that ammonium carbamate is fully decomposed during the flue gas denitrification process, the problem of ammonium carbamate agglomeration is solved, the denitrification efficiency is improved, the energy consumption is reduced, and the safety and economy are improved.

CN120644033APending Publication Date: 2025-09-16BEIJING HUANENG CHANGJIANG ENVIRONMENTAL PROTECTION TECH RES INST CO LTD +1
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Patent Information

Application Number
CN202510894001.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-30
Publication Date
2025-09-16

AI Technical Summary

Technical Problem

Ammonium carbamate is prone to agglomeration during the selective catalytic denitrification process of flue gas, leading to pipeline blockage and difficulty in decomposition, and the energy consumption cost of the urea ammonia production process is high.

Method used

A pyrolysis box for ammonium carbamate denitrification agent is designed to prevent crystallization. Double-sided heating components (first heating component and second heating component) are used to heat and decompose ammonium carbamate powder to ensure that it is fully decomposed into carbon dioxide and ammonia on the conveyor belt to avoid agglomeration.

Benefits of technology

The denitrification efficiency is improved, the energy consumption cost is reduced, the material waste is reduced, and the system safety is enhanced. The efficiency of ammonium carbamate to produce ammonia is increased by 5.9% to 23.5%, and the energy consumption is reduced by 48.0% to 65.0%.

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Abstract

The invention discloses an ammonium carbamate denitration agent pyrolysis box for preventing crystallization. The ammonium carbamate denitration agent pyrolysis box comprises a box body, a conveying belt, a first heating assembly and a second heating assembly. The ammonium carbamate powder is heated from the upper portion of the ammonium carbamate powder through the first heating assembly, the ammonium carbamate powder is heated from the lower portion of the ammonium carbamate powder through the second heating assembly, it is effectively guaranteed that ammonium carbamate is completely decomposed on the conveying belt, and the defect that a medium can only be heated and decomposed from a single face through traditional heating equipment is overcome. Ammonium carbamate powder is fully pyrolyzed on the conveying belt, so that the problem of pipeline blockage caused by caking of ammonium carbamate in the flue gas denitration process is avoided. The box body can ensure that ammonium carbamate is fully decomposed to generate enough ammonia gas for denitration reaction, so that the denitration efficiency is improved. As the ammonium carbamate is directly decomposed in the box body, the ammonia preparation method does not need to be carried out under a high-temperature condition like the traditional urea ammonia preparation method, the ammonia preparation efficiency is improved by 5.9%-23.5% and averagely improved by 14.70% compared with the urea, and the ammonia preparation energy consumption is reduced by 48.0%-65.0%.
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