Cooperative treatment and resource utilization process for CO2 in industrial solid waste and tail gas

Through the static reaction method of polyacids and catalytic accelerator, the alumina and iron oxide in industrial solid waste are converted into soluble salts. Combined with ammonia replacement and activated carbon catalysts, the problems of low comprehensive utilization rate of industrial solid waste and serious carbon dioxide emissions are solved, and efficient resource utilization and carbon dioxide recovery are achieved.

CN120243615AActive Publication Date: 2025-07-04崔怀奇
5 Cites 1 Cited by

Patent Information

Application Number
CN202510443944.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-09
Publication Date
2025-07-04
Estimated Expiration
2045-04-09

AI Technical Summary

Technical Problem

In the prior art, the comprehensive utilization rate of industrial solid waste such as fly ash, gasified slag and coal gangue is low, and carbon dioxide emissions are severe, and effective coordinated governance and resource utilization methods are lacking.

Method used

The alumina and iron oxide in the gasified slag is converted into soluble salts by static reaction, and the ammonia displacement method is used to separate iron hydroxide and aluminum hydroxide. activate carbon is used as a catalyst to absorb carbon dioxide to produce silica acid and sodium carbonate, thereby achieving efficient extraction and recovery of resources.

Benefits of technology

It has achieved efficient resource utilization of gasified slag, fly ash and coal gangue, and generated high-value-added products such as alumina, sodium silicate and activated carbon, reducing carbon dioxide emissions and reducing environmental pollution.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention provides a collaborative treatment and resource utilization process for CO2 in industrial solid waste and tail gas, and belongs to the technical field of environmental protection. According to the method, carbon residues in the gasified slag are used as a catalyst, and aluminum and silicon are extracted through the gasified slag chemical method under the polybasic acid aqua regia effect and the electrochemical effect. According to the method disclosed by the invention, a stack retting neutralization mode is adopted, so that the superacid and aluminum and iron oxides in the ash residues are converted into soluble salts, and ferric hydroxide, aluminum hydroxide and polybasic acid ammonium are sequentially replaced from a salt solution by virtue of an ammonia replacement method, so that the use safety risk of high oxidability of polybasic acid is overcome; rapid crystallization of the aluminum salt solution in the form of aluminum chloride is promoted by using the same ion effect; performing stack retting neutralization reaction on the slag charge and sodium hydroxide to generate sodium silicate, introducing carbon dioxide to obtain silicic acid and sodium carbonate, and reacting the sodium carbonate solution with calcium hydroxide to obtain sodium hydroxide. The sodium hydroxide, the polyatomic acid, the ammonia gas and the activated carbon are recycled for treating the fly ash and the coal gangue, so that the comprehensive utilization of multi-element solid waste is realized.
Need to check novelty before this filing date? Find Prior Art